One of the ways to properly dispose of an old U.S. flag is to burn it so it would make no sense to make it a crime solely based on the intent of the flag burner. If a protester buys the flag and pays for the gas and matches then they should be able to burn as many as they want to but that doesn't mean that I can't laugh at them if they set themselves on fire in the process.
Just set the record straight Hillary did not put for the idea that the act of burning the flag should be illegal, she put forth the idea that if one burns the flag and the action of doing so brings about criminal activity that person should be prosecuted.
Yes you are right the properly dispose of a flag is set forth here as one method
1. The flag should be folded in its customary manner.
2. It is important that the fire be fairly large and of sufficient intensity to ensure complete burning of the flag.
3. Place the flag on the fire.
4. The individual(s) can come to attention, salute the flag, recite the Pledge of Allegiance and have a brief period of silent reflection.
5. After the flag is completely consumed, the fire should then be safely extinguished and the ashes buried.
The retiring of the flag is done in a "respectful" manner. Therefore ******** that are burning the flag in protest are not "respectful"