This is typical Trump. Exactly what we've seen the entire election and afterwards. He says what everyone says around the water cooler. Then hopefully, after his advisers get in his ear, he says the more politically correct thing.
I'm a lawyer. I understand what the SCOTUS has ruled on flag burning. 5-4 vote twice, BTW. It's still a controversial subject. So, I'm well aware that Trump shooting his mouth off like that is typical knee jerk reaction that just can't continue when he becomes Prez. But as an individual, I not only want to revoke their citizenship, I want to take a Kaos shovel to their faces every time they shit on our flag.