Every fascist is a closeted piece of shit, but it has nothing to do with sexuality. They all know deep in their hearts that they're fascists, but they act and claim that they're not the fascist, it's everyone else who's a fascist. And they resort to violence anytime someone points out that they're a fascist, because everyone was raised to understand that fascists are weak, scared, little cosplay strongpeople, and their only defense is offense.
The closeted homophobia could be a contributing factor for some, but the closeted "fasciphobia" is very real for almost all of them. There are those few who proudly call themselves fascists, and they strike fear into the hearts of every closeted fasciphobe who are not yet willing to be seen shoulder to shoulder with an openly fascist pile of crap.