Forget that lot. What's really needed is a 1,000 bomber raid on Bitburg. It's small enough that that will wipe the place off the map, but it's also a key supply base for the German attack. Rendering it impassible will put a severe crimp in German operations.
That could be even more damaging to Germany than the obvious loss of a major supply depot.
TTL, Hitler and Co. are actually delusional enough to think they've achieved something great.
What you just described, a 1,000 plane raid that utterly and completely wipes a German city off the map would be a HUGE bitchslap of cold hard reality to the German high command.
They gassed American civs on U.S. soil, made this big breakthrough on the western front, etc...
And then the allied response is to bring a thousand plane raid to bear on a German city and wipe it completely off the map.
And they KNOW the WAllies can conduct raids like this until Germany either surrenders or ceases to exist.
Unless they've all completely gone insane by that point, (save Hitler, he's already too far gone, as evidenced by his decision that using gas in the field, let alone on an enemy's home soil) SOMEBODY is going to realize that they have made a terrible mistake and that the WAllies can do something the Soviets can't: Kill just about every German man, woman and child WITHOUT PUTTING A SINGLE BOOT ON GERMAN SOIL.
At that point, again, unless they are all utterly insane or delusional, there will be a successful Valkyrie ASAP...and the first guys to go will be the guys wearing the uniform of the SS, to make sure it succeeds this time.
It's either that, or watch their once thought to be 'Master Race' go extinct.