The efficiency of this organized flagging activity is impressive. The target is clearly stories that have political implications that a certain faction would prefer to suppress. I know that HN has algorithms to detect such things as voting rings. Why are flagging gangs allowed to operate?
Look, I've submitted stories about sex and gender, as well. Many got flagged. Some didn't and led to productive discussions.
It's very hit-and-miss, very luck-dependent.
And it's no use getting worked up about it, because you don't need "flagging gangs" for that. Many HNers flag those stories by default and on sight, without any coordination. If you cannot live with that, submit other topics.