The ideal of the citizen-soldier taking his musket down from the mantel and rallying to the defense of his home or to overthrow an unjust regime became untenable long before World War II. Basically there was no way for any of the Allied Powers could have materially supported the Warsaw Ghetto uprising. Warsaw was beyond the range of the B-17 and barely within range of the B-24 and in any event there was nothing a heavy bomber could do to support ground fighting.
True regarding the Allied powers in the situation. Stalin had no intention of letting the uprisers live as they would get in the way of his plans to completely control Poland. Model was disaffected enough that he wasn't going to attack Warsaw who he openly said was in the right for Nazi mistreatment of them. However, he wasn't the kind of general to send the Poles any support against the SS.
The one German Field Marshal whose personality style and views very well I think would have lead him to secretly meet with the Poles in rebellion and come to sort of arrangement for his under the table military support for their operations in exchange for only attacking the SS and not screwing with his operations against the Red Army was under investigation at that point for defeatism and treason.
Though it would make for an interesting timeline now that I think of it if Rommel had been injured say three months earlier before he did enough clear skullduggery in France against the regime to get him killed and in this timeline by the time Rommel is back in service Model had been killed or badly injured leaving Army Group Center without a leader.
When Rommel thought he saw true evil and in his words infamy when the SS Der Führer Regiment in France gassed and burned alive 642 French civilians (something he demanded the head of the SS Regiment's commander over) I can't imagine his response to serving at the East and seeing the SS was doing that and far worse on a daily basis.
Actually now that I think about it... this could actually make for a really interesting time line that few have considered. Rommel was never sent to the East because Hitler considered him too moral and thus too weak to accept what needs to be done there. Which was a smart move as he would have saw things that would vastly have crossed all his moral boundries. But, the July bombing f***ed up Hitler's head even worse then it already was beforehand and really reduced Hitler judgement. If he believed Rommel was still loyal and Model was injured or dead Hitler at that time very well might have given Rommel command of Army Group Center.
I think there is a good chance knowing his personality he would have after seeing what the SS was doing there for himself decided to provided enough weapons to the Poles under the table to make their rebellion vastly more successful to the extent where they are able to liberate much of Poland including the death camps in short order and fight off the SS and unless it is uncovered quickly by the time Hitler figures out what had gone on he won't be able to do a damn thing about it.
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Yes, this really would be one way to really f*** over both Hitler and Stalin. In that the death camps as well as Poland would be liberated earlier and the West would come to see the Polish uprising in extremely positive terms to the point they would be regarded as some of the greatest heroes of the war. They would tell the world (thanks to Rommel's help to them) that these are not the crimes of the German people or its Army they are the crimes of the SS and Hitler. They would tell the German people along with those in the West as the whole world would be listening over the radio that they hope the Western Allies and the good people of Germany will work together to fight this evil.
I imagine 'The People's Field Marshal' as Rommel was know would announce the crimes and the horror of the death camps that he saw over the radio along with having ordinary German soliders talk about what they saw after having visited them. If my reciently dead German friend who served in the East was right in what he told me that had the had the horror of the death camps come out from a source or sources the German people very strongly trusted during the war it would have fractured German society itself and caused a civil war in the country. Rommel was one of the very few people at that point universally respected enough in Germany that most of Germany would have believed him and at that point many Germans had a vague idea already the Nazis were doing bad things in the East.
Its quite possible if the uprising is that successful the Western Allies decide to air drop massive numbers of troops and if possible land troops north of Poland which would really really f*** over Stalin as he would have to decide if ruling Poland is worth going to war with the Western Allies in late 1944 which he just might decide to do so given American nukes would still be in his mind a year or two away.
If the Western Allies don't land or air drop troops to Poland then when Stalin takes Poland and puts down the Polish uprising brutally and kills their leaders I think FDR's bromance with Stalin ends as does Lend Lease and the Cold War starts in 1944 with there being vastly more support in the West for Churchill's plan to attack the Soviet's after dealing with the German forces in the West who would be vastly more demoralized then they were OTL to the extent I see the Western Allies taking Germany before the Soviets.
The real question is what does the German Army in the West do. I imagine they would be angry and demoralized from the events and news from the East. Do they surrender in mass to the Western Allies or do they pull back to Germany to help those Germans who at that point would be attacking SS units around the country and I actually believe my now dead German fiend on this. The death factories were a line that very much crossed the point beyond what ordinary Germans at the time including most of the Army would have been able to accept.
There is also the question of what the Western Allies do. Lets say If the German Army in the West is pulling back after the news and their relationship with Stalin just turned cold as ice and decisions to divide up Germany with Stalin and Lend Lease to Stalin have been openly terminated after news reports of NKVD troops on mass gunning down the heroes of Poland and with Germany in a state of war with itself do they effectively decide to take sides in the civil war while still planning on occupying Germany? Do they openly support the Poles still fighting the Soviet's as well as what is left of Army Group Center who will be fighting alongside them as well by landing troops north of Poland?
Do they decide that while they will occupy Germany after the that it would be in their interest to make a deal with German commanders returning to Germany with their troops along with Western Allied troops to overthrow the Nazi Party and wipe out the SS in exchange for letting the Germany Army continue to fight the Soviets and openly backing them to drive the Soviets out of Eastern Europe on the condition that Germany will be occupied along with Eastern Europe while allowing Germany to have at least during the war have the facade of a German government to appease Germans while London and Washington have veto power over its decisions?
Basically in that case its Churchill's Operation Unthinkable on steroids with enough German troops to make it work. Churchill would be all for it, but in order to convince the Americans I think he would have to make sure there are some U.S. and British troops in Poland aiding the Poles and they die heroically protecting the Poles against the Red Army with their names and the rest plastered over the radio and the news. That would be enough to turn around American public opinion overnight to the point Americans will be demanding that the U.S. declare war on the USSR as well. If FDR decides to continue to try to play nice with Stalin and view America's only real enemy in Europe as Gemans he will lose the 1944 election to a GOP who will run on a hard core anti Soviet platform. Then Churchill would have an American ally who is willing to support his ideas of both overthrowing the Nazis while using the Germans with significant Western Allied help to push the Soviets out of Eastern Europe.
Alot of pretty interesting possibilities could come out of this.
