Marvin, there are, in any group in any forum, people who are jerks. There just are; it's a fact of life on the internet.

For some reason, they tend to shy away from THIS forum, perhaps because of strong moderators here.

I haven't been to that FB forum, but I have heard stories about them, so your experience isn't a surprise to me.

If there is good info there, then you can choose to put the jerks on Ignore. That can really be helpful, for people whose comments are rarely anything but nasty.