The "Just and lasting peace" I am refering to here is, of course, that peace that never was (because of Britian and France), the peace that should have been negotiated at the end of WWI.
So, did the British 'betray' the peace that could and should have been @ the end of WWI? Absoutely, no question about it. Without her demands (and Frances), there might not have been a WWII at all. No WWII, no Nazi's, right?
Also, everyone needs to keep in mind that the UK was cutting off US trade with one of our major trading partners whit her blockade. This is not a good thing and didn't lead to hard place with the USA in WWI primarily because they bought up everything we could sell them.
And, let us not forget that the illegal arming of British merchantmen in WWI forced the Germans to abandon the whole 'shot accross the bow' standard, and replacing it with the well known "Unrestricted submarine warfare" we all know so well.
So yes, Britian does need to answer for her conduct, and yes, if things had been done differently, I could see the US deciding to trade with both the UK and Germany (and thus ending the UK's naval blockade of Germany). What exactly would the UK do if the US refused to stop trading with Germany, and escorted her merchant ships to German ports?
My point with all of this is to try to provoke thought, and to awaken people to the facts that history didn't HAVE to follow the path that it did. Things could have been quite different, and it really wouldn't have taken all that much to knock things off kilter from what we know.
As harsh as the treaty at the end of WW1 was I do not and never will accept that it was the cause of what followed later. The blame rests with the german people who allowed the nazis to do what they did. A lot of things happened over the following 20 years that had more impact, things such as the great depression that caused far more suffering to the german people than the treaty did.
And as others have pointed out, given the actions of the germans in WW1 they actually got off lighter than France would have had the germans won. Let us not forget that the germans pretty much caused the whole thing in the first place, they told Austria to do whatever they wanted and that germany would back them up, they invaded neutral countries, and the war they started caused millions of deaths on a scale not seen until then. There was naturally a strong desire to punish the germans for what they caused. Britain and France are not innocent, but when compared to germany they are not in the same league!!
As for the trade blockade, sorry but that is a perfectly normal action in a time of war, especially an unprovoked war of murder and agression of the kind that the nazis launched.
Allowing your enemies to be supplied (even by your friends) is something that you simply can not afford to allow, hence the reason why the same tactics are used today, even without a declaration of war. All the "trade sanctions" that are used throughout the world are exactly the same thing.
You are right that history didnt have to follow the path that it did, however the only people who had the power to bring about major alterations were the german people, and they chose not to. They allowed Hitler to exploit/manipulate them and take power, they supported the mobilisation and they started WW2 by trying to conquer all of Europe. They picked fights with neutral nations to do this.
Now getting pack on the real point, if you allow for a much earlier POD, namely back in the 1930s and change the entire strategy and behaviour of the nazis then maybe (and its still a huge maybe) the USA might listen to them as per your suggestion.However, as has been repeatedly pointed out there is absolutely no way in hell that anyone trusted the word of Hitler in 1941 and certainly no way that the US would take the side of the nazis at the expense of their long friendship with the UK, Canada, Australia, France etc