We look at it from different angles. You appear to consider the act of flag burning asa protected part of a person's "speech". I do not.
We have this disagreement on a BBS, great example. We're both entitled to our opinions. If you were to track me down and break my legs, that would constitute an escalation of that disagreement beyond what the law protects. I view flag burning as a similar escalation. When a peaceful protest demonstration turns into a hateful orgy of flag-burning anti-americanism, it SHOULD be broken up and the participants SHOULD have that as a permanent stain on their criminal records.
It's illegal for the KKK to burn a cross in the local black man's front yard--in fact it's a hate crime. Physically, it's harmless, but it's very powerful in a symbolic sense. Do you feel that should be legal? Burning our flag is (or, more correctly, should be) a hate crime against ALL of America.
J_A_B