These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Liberals in general, specifically anti-war supporters and the ACLU.
Anvilicious: To say that this movie is nothing but a far-right polemic would be an understatement. Many critics felt that the hammering of the message got in the way of the jokes.
Audience-Alienating Premise: The pro-war message does not exactly endear this movie to liberals, and the crude humor is a turn-off for many conservatives.
Critical Dissonance: Critics, both liberal and conservative, were not too kind to the film upon its release. However, the film has found somewhat of an audience and defenders in the conservative populous. There are also a large group of people without much of a voice in politics who simply found the film funny.
All the great things in America's history comes from war, and if you're against it in any way, you're no better than Those Wacky Nazis or Bin Laden.
Similarly if you disagree with the Patriot Act or other measures, then you are spitting on the memory of innocent victims of terrorism (The Onion singled out this mindset as one of the movie's crimes when featuring it as one of their "Commentary Tracks Of The Damned").
Poor Man's Substitute: Kevin Farley bears a very strong resemblance to his dearly departed brother Chris.
Strawman Has a Point: Even Michael Moore's fiercest critics were put off by this portrayal, noting that while many hate his methods and character, they have some level of respect for his views. In fact, much of Moore's criticism comes from people who agree with him.
While the films message can come across as heavy-handed, the underlying point that America currently faces dangerous enemies (such as Radical Islam) and should remain constantly vigilant lest we suffer another 9/11 are very justified points.