This old trope? Died for the flag? Seriously?IMO, anyone in the U.S. who burns the American flag should leave the country and anyone outside the U.S. that burns the American flag shouldn't try to come here. America is America, love it or hate it all you want but respect the flag that many have died for. Again, that's my opinion.
Some care more for image than reality. I should hope they died more for what the flag symbolized than for the actual flag. It's principles that should be respected, not symbols, and it's the duty of a good citizen to actively seek and publicize discrepancies. If that involves burning the flag to call attention to the disparity, no real harm is done. It would probably engender more discussion than a letter to the editor.