No. They will have to identify themselves to you. I don't keep track of things like that and considering many don't see the need to spell out what they are one only learns after writing to them via freep mail. You might check out Project 21. Several freepers are associated with that group.
But if you doubt conservative black attack black groups, just search on Ward Connerly, Armstrong Williams, Thomas Sowell and Walter Williams. There must be some conservative Jews who go after the liberal Jewish establishment the way conservative blacks go after the NAACP but I can't think of any. Rabbi Levin is the only person who comes to mind.