There is a group called Britons for Brexit, which I used to belong to until yesterday. A post was put up showing you had banned (quite rightly) a piece about cancer "cures." I explained in a reply that it is illegal to advertise cancer cures in Britain, in order to protect gullible people from wasting their money. One of their Moderators, Zack Pan, on the site took issue with this and was most offensive and obscenely rude when I pointed out to him the realities of the disease. I feel that this group generally is going way off topic from its original conception and you should now think about banning it, or at least monitoring it very closely.
I trust that Facebook will make this right and come up with a resolution that is fair.