This is not a prominent group of American Jews. They look pretty fringe to me. This stunt is a way for them to get some free publicity.
100 leftists could easily create 400 organizations between themselves, organizing and coming up with organization names is what they are good at.
Yeah, there’s a kadre of these tools. You can always rely on them being on the spot, kissing Ahmadinehjad, defending Soros as a holocaustsurvivor, and generally making asses of themselves.