Peter Beinart September 2017 said mainstream left supported Antifa, now not so much

You can tell we're getting closer to the election when what the left said was definitely the case in 2017 is no longer the case in 2019, and we're just making it up.

"Trump’s rise has also bred a new sympathy for antifa among some on the mainstream left. ... [Their violent] tactics have elicited substantial support from the mainstream left."