Not worth getting arrested on assault charges. Just ignore him for now. Besides leftist commies like to play dirty... he could fuck with your property, your car or worse.
When society breaks down and rule of law no longer applies, then you can have at him without any legal hassles. Although you might have family members coming after you wanting revenge.
America has always had political differences and that's why we have heated debates.
In the end , since 1789, we've settled it at the ballot box, save one time ( Civil War 1861-65)
Even during the Civil War the USA had an election.
FREE Speech is NOT about shouting others down or threatening violence.
If you feel passionate about your side, you run for office or back someone else.
Then, we debate, argue, campaign and do our best to PURSUADE others to join us.
Finally we all vote and count each and every official ballot to determine the winner.
FINALLY , we agree to a peaceful transition of power.
Free and fair elections with a peaceful transition of power are the hallmarks of American democracy.