I have high regard for the scholarship of this man. However, he would not have been arrested if he had not stepped outside onto his porch. The police can not come in without being invited and you are always safe from arrest until you step outside the house if you haven't done anything. Since he was yelling at them, I think anyone would have been arrested once they stepped outside.

If you want to yell at them, don't go out on the porch!
My two cents