Interesting Opinion Piece ... Actually, a series of OP ...

[1StrongBlackMan]

I know that PUBs and pro lefties don’t think they’re racist or sexist, but that’s kind of the point. For some reason, there is a sense that they believe that calling themselves progressive gives them a pass to say whatever they want to People of Color, immigrants, and women.

...

And this is the problem with these people in a nutshell. PUBs have convinced themselves that the issues they have decided are most important in our society are the most important issues for everyone and that their position on these issues is the only acceptable position. They live in a tiny white (mostly male) bubble and don’t care how anyone else thinks about anything.

http://pleasecutthecrap.com/racism-isnt-exclusive-to-the-right-wing/

The rant(s) is/are written by a white person; but, could have been written by any African-American that has regularly posted thoughts to the group, that is unrelated to Sanders, as it is what has been written, repeatedly, since January 2009.