They are using their flag as an enemy flag of conquest, in OUR land. That makes it fair game. Burn it. Deface it. Drag it. Stomp it.
Do it when they will see it, and they will go even more loco, totally off the rails insane, in full view of America.
This is OUR country!
Clearly, Travis, these invaders intend to make it THEIR land and toss the 'gringos' who will not bow to their demands. Why else would they/do they boldly display their Mexican flag when marching for 'U.S. inclusion'?