Unfortunately Antifa defines anyone that is right of them as fascist. That's why this is very dangerous. Many on the left have suddenly found themselves in the "fascist" territory of radical leftists for simply engaging in conversation with people that are deemed guilty of "wrongspeak". Unless you're an anarchist communist, then you will eventually be in their cross hairs. They accuse the orthodox Jew Ben Shapiro of being a neo-nazi. That's how insane they are.
Also, the SPLC are grifters. They have to keep those donations rolling in.
Otherwise how will they pay for that big shiny building and all those salaries for lawyers? A bit more on their money issues.
The FBI stopped using them as a data source a couple of years ago because they've become so shady.