The Flag is a sign, a referent to an idea. This "idea", as such, is different in each and every person on this green earth. So, when you have one uniform symbol, that encompasses such a multitude of "ideas", being either revered or disrespected, remember that what "idea" said symbol represents in you, is assuredly not the same idea being spat upon in another's mind. Once you realize that your individual "idea" is not what is being attacked, only the symbol which happens to refer to it in your own case, then will you no longer be disconcerted at its destruction, for you will recognize that the symbol is, in fact, arbitrary. Only the idea is what matters, and nobody can burn an idea.