Now though, we see it coming from both "right" and "left" (as in the Women's March scandal).

I had to google it, found this:

https://www.nytimes.com/2018/12/23/us/womens-march-anti-semitism.html

https://www.tabletmag.com/jewish-news-and-politics/276694/is-the-womens-march-melting-down

So it doesn't really surprise me , the whole stuff is full of cringe. Some movements are about "inclusion" they're about reductionism, they're based on self-centered impulses that center around a part of someone's identity, their tendency seems to be to repeat the process and move towards narrower and narrower aspects about identity.

It's the logic of:

First they came for the socialists, and I did not speak out— Because I was not a socialist.

Then they came for the trade unionists, and I did not speak out— Because I was not a trade unionist.

Then they came for the Jews, and I did not speak out— Because I was not a Jew.

Then they came for me—and there was no one left to speak for me.