Your hypothesis proves my point. Some just can't separate craft from politics. If the film you mention does have some spectacular innovative technique craftsmen and connoisseurs will take note. Special achievement speaks for itself as does foolishness. Sometimes both can be found in a single body of work, both are examples to learn from.
P.S. Not much of a chance for Moore to do anything noteworthy. You should have come up with a more believable example.
Roger Ebert tried to make the point in one of his columns that he could separate politics from a film but he gave a zero star review to a movie that he liked the acting in and the filmmaker in general because the story went against his views on the death penalty and the story was set in Texas no less.
Is Mr. Ebert an authority on the movies? He's been at this for over 30 years.