Thing is, the line between patriotism and nationalism (as you've made the distinction) is very fuzzy, and often very faint. As someone who spent a good part of my formative years in a country that took nationalism to the extent of invading other countries in order to "save" them and bring them all into a giant sphere of co-prosperity (which just happened to also serve the purpose of acquiring resources to keep the economy going, but hey), starving the populace in order to put all resources toward the army, with all this in the name of the national cause, plastering the flag and patriotic slogans all over every surface in sight, some of the flag-waving fervor I see in THIS country strikes me as rather disturbing.

That's not to say that I find all presentations of patriotism to be wrong, but I do wish that people had a greater sense that patriotism and national pride can be a very STRONG medicine, as it were, and that it really shouldn't be used so lightly.