absolutly. Despite your particular ideological leanings the picture can be viewed on its own merit. The picture was compelling. One of the more powerful moments that I have ever expereinced in a movie theater was Moore's choice to let the picture go completely black and only play the audio of the towers being hit and coming down. That haunted me in a similar way that the actual day of the attacks did. He captured the emotions people felt at the moment of the attack in a way that the video does not anymore (maybe because it has been played billions of times). That type of artistic choice is contained throughout the film.
Moore also did a great job capturing the fear, anger, paranoia, humor, politics, and the ubsurdidies resulting from 9/11. It was great film making, notwithstanding his politics.