>>6248OP here. I agree that sadism and fascism aren't correlated as such, but I suspect that many of those that take initiative in regards to the oppression of certain groups are. The average MAGA retard is driven mostly by fear, and sometimes hatred, of specific groups. Your average neo-nazi terrorist, on the other hand, is driven mostly by hatred, and I believe often sadism.
Take for instance the O9A, a neo-nazi terrorist group who not only advocated for your standard nazi drivel, but also reportedly practiced routine sexual violence. According to the Counter Extremism Project, one of the O9A's publications titled "The Rape Anthology" called for followers to seek "spiritual arousal from violent sexual rape."
Additionally, the CVLT network is associated with nazism and is known for making and distributing child pornography, as well as convincing minors to commit self-harm.
As for whether or not these people could be trusted if they decided to fight against fascism and the neoliberal status quo, I think that showing them that they don't need to adopt spook of nazism in order to fulfill their desires will give them a sense of freedom that they would be unlikely to give away again.
I think that this freedom, particularly for a sadist, is a very powerful motivator to avoid the hierarchy imposed by fixed and external ideas.
I definitely respect the decision to not trust them, however, as most people are limited, for better or worse, by empathy, which makes them much more predictable. That's not really something you can expect from someone whose main driving force is sadistic pleasure.