Well, on the flip side:
I heard multiple "The problem with Republicans is old white guys" comments on NPR and CNN. From respected "pundits" no less. Talk about your sexist, racist , ageist comments!
Substituting the words "Democratic" and "young" and "of color" sounds pretty silly.
I'm all for free speech, though. There will always be a noise component in political discourse and we Americans have pretty good filters.