Insulting someone with words and punching them in the face are two drastically different things.
Note that it is entirely play pretend anyway. I know for a fact that I can actually say and do far more here than the American society would tolerate in the USA.
For what it’s worth, having lived in both places Americans are less likely to insult you than the British, but more likely to take it seriously.
This, for instance, is clearly an insult; please report to the nearest detention center for your reeducation immediately. /s
But seriously, no; insults are subjective enough to be a terrible legal basis.