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