I won't argue that Michael Moore's movies don't have some very useful arguments or that they don't provide some compelling evidence for those points, but I think it's very important to take anything that's presented in the way that Moore presents his material with a grain of salt. I would agree that his movies that I'm familiar with could accurately be classified as propaganda. That doesn't mean that the evidence or points he makes are deliberately misleading, but it does mean that his stances include some level of bias and you shouldn't immediately accept anything he says.