What exactly is the problem with these people anyways?

First guy I heard this phrase from - bear with me please - is Alexander Reid Ross. He wrote articles about the subredditstats/etc analytics on the Chapo subreddit calling them all fascists. Seriously. He wrote articles on Juche Nazi and White Nationalist Maoist twitter accounts he probably made.

He got ousted from his university (portland state?) for sexual harassment.

Anyways that's the most legitimate use of it in history all the other examples are worse. It's used to sell a completely wrong version of WWII that absolves the allies.