they have the flag for conditioning the children and strengthening their sense of patriotism building up nationalism in the youth..
i think that in itself is wrong on sooo many lvls but the kids removing a flag that is being used as a decoration for a certain holiday for a group of ppl is also wrong.
if he had a problem with it he should have told his teachers or parents and left for the day.. being patriotic doesnt mean disrespecting other ppl on a specific day.