Burn his car to the ground and write your name on the spot
Best thing is to forget about it. Even an apology would make the guy think your a push over and he will continue being an ass anyways.
Just keep parking like you always have.
I live in an apartment and I pay for my spot that is numbered and people still park in my spot that don’t live here. Makes me crazy but nothing I can do about it.
Any type of retaliation or escalation of the situation could result in your car being damaged or having to worry all the time that something will happen to your car.