A turd.

If you want something that he would enjoy, Mein Kampft.

I mean, I’m sure at this point he has been exposed to most literature and works to not be a fascist, this won’t get fixed with a gift. Maybe try to have a 1 on 1 conversation with him, let him speak an express why he thinks like that, let him go deep, let him talk about his feelings. Fascism always root on untrue information and resent. If he respects you, you can then talk about where he is wrong, confront the lies, but embrace him as a person.

If you want to win your son back, it will take real work, respect, and love. These people get lied to, and they believe because they are full of resent and want an explanation, someone to pin all the problems, an enemy. Uprooting that is hard, but sometimes family and friends can do it. If family and friends deepen those core beliefs, nothing is going to change.

Source: When I was younger, I was that stupid too. Friends made me realize it.