I doubt that.
Do ya now?
Then tell me why during an Olympics in Mexico City, the US team was mocked, spat on and disrespected during national anthem, as the Mexicans chanted of "Osama" during the match...
Just a guess but I'd bet the Mexicans in Mexico City didn't learn that from U.S. public schools.
Yes, I do.
Are there some radicals who might do this? Sure. But to over-generalize, and assume all Americans of Mexican descent think this way is just wrong.
As someone else pointed out, the boy proudly displaying the flag is himself of Mexican (or at least Hispanic) descent.