Nothing says freedom like burning the flag.
You may find this disrespectful. You may be offended. You might be mad as hell. (And, I have not yet even mentioned the part about pissing on the flag to douse the flames.)
It comes down to this: If you really want to be free, then you have to let others have their freedoms too.
If you want to outlaw things that do not infringe on your rights, but simply offend or anger you, then you do not want freedom. You just want to be in charge.
Ron Paul put it so eloquently in a 2003 speech on the floor of the House of Representatives:
“I think what we are trying to achieve through an amendment to the Constitution is to impose values on people — that is, teach people patriotism with our definition of what patriotism is. But we cannot force values on people; we cannot say there will be a law that a person will do such and such because it is disrespectful if they do not, and therefore, we are going to make sure that people have these values that we want to teach. Values in a free society are accepted voluntarily, not through coercion, and certainly not by law, because the law implies that there are guns, and that means the federal government and others will have to enforce these laws.”
Besides, if we started putting people in jail just for being a-holes…well, you know.
(Please note: Ron Paul is not necessarily in favor of flag burning, but has stated that he views it as a state and not a federal issue.)