Why nationalism is bad:
"the people can always be brought to the bidding of the leaders. That is easy. All you have to do is tell them they are being attacked and denounce the pacifists for lack of patriotism and exposing the country to danger"
The more people willing to join in with this 'denouncing', the more likelihood your country will become like Nazi Germany. The quote is from Herman Goerring at the Nuremberg trials.
http://www.workingforchange.com/arti...m?ItemID=15630
Protecting your president nomatter what, and demanding that others show no disrespect is one step along the path to totalitarianism.