The Google guys are (self proclaimed) world improver types and therefore liked and celebrated by statists (which includes a lot of techies - “progress through government-approved AI”).

The FB guys are primarily business people, which in the eyes of the former group is a big minus.

This guy is against FB because he knows more about it than about Google so it makes more sense to fight them than Google or Tencent. I believe other factors (which I mentioned above) are also in play.