You're saying that I should expect to be assaulted and arrested in response to an exercise of free speech. That's a fail.
If I persist, or defend myself, as people attempt to stop me, are you positive that I wouldn't get shot by some trigger-happy kid like Kyle Rittenhouse?
The response will be armed
You will not be Shot unless you tried to harm someone first
You will be yelled at, called names, and maybe at most hit across the head
They will try to stop you, put out the fire, and prevent you from burning the flag
They will not shoot you dead...