I am a very liberal person and I have very liberal children, except for one. I'm pretty sure my Gen Z son has been taken in by fascist doctrine. What can I get him for Christmas?
Perhaps if u talked to ur son abput his beliefs and didnt invalidate his opinions simply because u disagree u might both learn a little and grow as people. Calling ur son a fascist is only going to make him more steadfast in his beliefs.
Trying to force him to believe what u want instead of teaching him to think fof himself and excercise his free will to develop his own identity separate from what u told him might be a wise idea.
As for what to get him for Christmas how about sonthibg unrelated to politics that he legitimately wants. Go speak to him and ask him.
A lot of young men are sucked into this world, what you have described is exactly what I took OP to be looking for.
They might get them a membership to a gym or tools for a hobby that allows them to socialise outside of online.
Op mever called their son a fascist or mentioned they want them to believe the same thing. Fascism is harmful, thats why even the fascists call the others fascists, it is not a bad idea to want to realign someone's viewpoint with reality.