The most important point to make about this is : It is a Game... If they get their rocks off shooting at cartooned Tea Partiers, so be it. I get my jollies shooting at Nazi zombies on COD: Black Ops from time to time.
They will depict what they believe will sell. It is capitalism in action. If it does not sell, they will not make money, and they will go out of business. (Or maybe they will be taxed out of business, lol)