Why won’t media demand Dems condemn Antifa?

Over the weekend, Antifa anarchists draped in black masks and carrying home-made weapons disrupted a peaceful demonstration and counter-demonstration in Berkeley, CA. The violence from the alt-Left group was so obvious and one-sided that even the Washington Post framed their article with no uncertain condemnation of the thugs in their headline: Black-clad antifa members attack peaceful right-wing demonstrators in Berkeley.

So why is this group, whose political ties clearly lean in synchronicity with the Bernie Sanders/Elizabeth Warren wing of the Democratic Party, not being condemned by Democrats for their thuggery and violence? And, more importantly, why isn’t the media demanding Democrats do so in the same way they demanded Republicans condemn neo-Nazis and White Nationalists?