At least one of the sources in this article, the Washington Free Beacon, is financed by a right-wing activist.
https://en.wikipedia.org/wiki/The_Washington_Free_Beacon
So yeah, doesn't really seem like a case of progressives eating-their-own
https://en.wikipedia.org/wiki/The_Washington_Free_Beacon
So yeah, doesn't really seem like a case of progressives eating-their-own