>I mean the US had no problems selling Nazi Germany arms at the start of the war.

This claim doesn't appear to be true: https://www.reddit.com/r/AskHistorians/comments/1k6yi1z/comm...

It's both frustrating and all too common to see blatant historical falsehood being casually thrown around as if it's well known fact. Doubly frustrating knowing that in order to rebut such falsehood, you have to either do your own lengthy research to find the evidence of __absence__ (which is a lot harder comparing to the evidence of __existence__), or hopefully someone else already did said research and more hopefully you can unbury it from the increasingly enshittified google search.

And by the time you managed it the falsehood already netted a few dozens/hundreds/thousands more victims in the best case scenario where the rebuttal actually managed to attach itself right next to the falsehood.

Regular folks just can't compete with professional disinformation spreaders and their horde of victims.