It sounds like the left wing indoctrinated little A-hole was looking to get one over on his dad.
If it were my kid I would put his ass on the street with the clothes on his back. If he wants to eat he can find a job and join in to out capitalist society. Many of us were on our own and independent at 18 and now it is his turn.
During the last civil war families ended up on different sides and not all of them lived through it. This little A-hole needs to figure out if he values his communist friends of his family more.
I’ll give him a hint, his communist friends won’t write him out of their will but his dad would be stupid not to.
I believe they just got two of them.