Left wing identity politics certainly is a problem.

The whole isssue as to why the media won't denounce it is because complex explanations don't work in a soundbyte. "Fascism is bad, ANTIFA is against fascism, therefore saying they are bad makes you a fascist". Seek reaction, get ratings, rinse and repeat. Not that I don't believe they could do better, because they certainly could, but the fact is they don't.