I didn't see where he said that. He used the term "abuse", and using the flag "derisively" when describing what happened. He was absolutely right, unless you have some evidence to the contrary.
And we define "abusive" here as: "The presence of an American flag".
Again, you are putting words in his mouth. He decried the abuse of the US flag. I'm a little slow at times, but that just doesn't add up to an anti-American stance, no matter how much you want it to. And where in the article does it say that other than the one instance referred to by the principal, was the Mexican flag thrown into people's faces?
I got news for you. When the Marines planted the flag on Mount Suribachi on the island of Iwa Jima, it wasn't out of respect for the Japanese.
You really aren't trying to suggest even the remotest of comparisons between the planting of the flag at Suribachi and what the idiots in Longmont were doing, were you?
"the abuse of" = "the waving of". It is the principal who abused the flag. These kids brought honor unto the flag.
I believe it was the ones flying your Mexican flag that were the idiots and it's funny that you believe the flag at Suribachi was planted to honor the Japanese.
As far as comparisons go, Suribachi was more honorable and these students' waving of the flag was more honorable than the mere display of the flag I have on my front lawn.