Effects on Europe/WWII with a socialist USA

There's been a thread on this before, but when considering it and Jello's Reds timeline, I can't say I completely buy the whole idea of a Western Europe/Japan v. USSR/USA war. As certain as I am that Britain (and France, unless their political and social instability is worsened/the homegrown socialists are emboldened, thinking to their nonaction with the Spanish Civil War) would go for detente with Hitler and Mussolini and at least initially let them slug at central and eastern Europe, I don't really buy the concept that they are suddenly going to down stupid pills and propose an unholy alliance with the Nazis that they will surely lose. Also, what would the Spanish Civil War look like, if it happens as in OTL? Early war?
 
I guess it depends on the brand of socialism. I personally haven't read the "Red" timeline but I imagine there some sort of home grown "American" socialism that will look different to the USSR?
 
Top