An insecure bully, is an insecure bully who feeds off of bringing people down.
I haven't read the post you mentioned as the very same person you speak of attempted to pull a similar situation in my own experience as well it seems. Not happening. I avoid posts with she/he.
The best way around a bully, don't run as they feed off of that. Just stop giving them your energy. Avoid posts with them.
Edit: It's wonderful all of you are opening up and sharing your thoughts, opinions, agreeing/disagreeing, what you weren't allowed to do within the cult. There is a line however between insulting people as a 13 year old bully would and agreeing to disagree.