Flag burning only matters if people get upset when you do it.
It's sort of an interesting topic to me because I've never cared one way or another. I love my country, I don't need a bunch of symbolism to validate it for me.
But it's like people who get so bent out of shape..."flag burning should be punishable by imprisonment/castration/death!"
...you understand that's the reason they're doing it, right? If it didn't get a rise out of you it would be meaningless. They're not doing it to disrespect the country. They're doing it to disrespect the people who piss them off, and the people who piss them off hold an inanimate object as sacred.
It's like, yes, some of the alt right people giving Nazi salutes might actually be skinhead pieces of ***, but some of them really just want to piss off uptight alarmist left-wingers.
The real amusement comes from people who do the latter, but get really upset about the former, because it means they don't get their own joke and that they're every bit as uptight alarmist jackoffs as the people they lambast on the left.