patriotism is a divisive way to think. patriotism is just another way to group people up into nice neat hateable portions. patriotism leads to wars and all the horror they entail.
any amount of patriotism is divisive. it creates an "us" and a "them". and whenever you get an "us" and a "them" there is a potential for trouble. with no "us" or "them" there would be no one to bomb. there would be no borders to dispute. there would be nothing but individual people. mass hatred, mass killing, mass discrimination could not exist.
any amount of patriotism sets you apart from a whole group of other people just waiting for a reason hate you.