It's an interesting contradiction, but I might point out two things: first that the people greenlighting the films you're referring to do so for financial reasons, not ideological reasons. Second, to paraphrase Tim Robbins, it is a myth to think that Hollywood is "liberal" at all; the subtext of every action film is that you often need to fight to get your way-- and fighting can be awesome.

One can judge the town by the product it produces and conclude that "pushing liberal values" is not a priority for Hollywood.