Back in the GG days, Rerez hyped and uploaded a video where he claimed he had found a solution to the "Anita Sarkeesian problem" (a woman having an opinion on the internet). His video explained that the solution was to allow her to create a videogame, and if that videogame failed, then she could fade away from the industry, defeated. Obviously this video did not have the response he expected. Later claimed that "both sides are bad". When he was later on a video about a trip to a game store, and Alpha Omega Sin was there too, I understood what side he was.
A few episodes ago this year, Joe kept mentioning that he was friends with Alpha Omega Sin, who not so long ago sent his considerable followers to harass Retronaut's Bob Mackie, and also tried to bait him into a twitter fight. Mackie wisely did not fall for that.
Rolfe, Matei, Shane, Joe, they all associate with this guy. Just do a google image search for "alpha omega sin sjw" for the youtube video snapshosts of what his content is if you do not know who this is.