Every fascist movement I can think of has been right wing in some way.
I’ve heard people say fascism can be used by both sides however.
But every leftist movement i could consider fascist is described as communist, and I know both of those ideologies hate each other, so I don’t think someone could simultaneously be communist and fascist.
So has there ever been a case of leftist fascism?
Is communism and fascism mutually exclusive or can someone be both at the same time?
I’ve also heard arguments that Mussolini was a leftist as he spent time in the socialist party, is that true or is that being distorted?
If this is not the right subreddit to post on I apologize
Whether or not there have been cases of 'leftist fascism' I cannot say, though on the face of it it feels oxymoronic - our two major fascist examples, Mussolini's Italy and Hitlerite Germany, were both virulently opposed to communism. However, we can have a go at the demarcation you're pondering here by considering what fascism is. Here's some previous answers in that regard: