Edit: let me clarify, as someone who has served under that flag I fully support people's right to burn it to show their frustrations with our system. Burning the flag is a very powerful statement and in an ideal world we would find out why the flag is being burnt and attempt to address the grievance though I doubt that actually happens.
Ding ding ding. Anyone who claims to love this country but thinks this should be illegal is outright lying, and they can go fuck themselves. This is one of our most fundamental rights.