Hitler wore pants. Does that make anyone who wears pants is a Nazi too?
What Hitler knew (and Stalin too!) was that good art has the power to communicate with people in important ways and that what he called “degenerate art” didn’t. He was right about that even though he was horribly wrong about a host of other things. Hitler also used good artistic expression as a powerful tool to promote his Nazi viewpoint but it was generally the message, not the medium that was flawed.