I actually had a look at a few of the more frequent and ardent defenders in that thread and lots of them were extremist lefties. It's pretty well documented that pedophiles ally themselves with these sort of groups historically with the goal of being seen as just another sexual identity. 

Some of them could be sock puppet accounts, but in general the extreme left as of late has been pushing to sexualise younger and younger minors. Take [this story](https://www.google.com/amp/s/www.lifesitenews.com/mobile/news/11-year-old-drag-kid-dances-in-popular-nyc-gay-club-as-patrons-toss-money-a) for example where a cross dressing 12 year old performed at a "no cellphones" bar in nyc. There are some really bad people in the world trying to normalise some really evil shit.