Whoever runs the FB Group, would you please enforce the rules...

[Robert Vermaat]

Instead of complaining here without going into details, simply report the actual post or contribution on FB and one of us will take action if action is warranted.

A link to the thread not enough? I got a response three weeks ago: they're understaffed, so can't keep track 24/7. Some of the comments were deleted, while others remained and like an hyrda, new ones popped up. What's sad is that these people feel they have a right to post this nonsense and get offended for being called out.

You're barking up the wrong tree my friend. The link is to the FB page of Ancient Warfare magazine, not the FB page of Roman Army Talk. 
AW is a commercial business, please complain to them.