All of their arguments are also posed in a way to make anyone who disagrees seem like they're disagreeing with something very reasonable. It's phrased in such a way as to imply that they're in the 100% right, and if you dare disagree you're a bigot/homophone/transphobe/whatever other bad thing that can stick.
Every time I've seen a project get targeted by these CoCs, all the maintainers approach it from a good place assuming no malice, whereas the ones pushing for it will NOT take no for an answer.
I mean just look at one of the final comments in that locked Opal issue: https://github.com/opal/opal/issues/941#issuecomment-1132902...
They're blatantly trying to paint anyone disagreeing with them, no matter how mild the disagreement, as someone attacking them directly, and there's a scary amount of people who would side with them as well.