Nor you should start hawking TF, everbody seems self-governed compared to some messy forums I've been to. People may have pressure points though, things may be going downhill for them and may take anything to heart. It's only natural when interacting through text. Would not imagine an established member of the forum would do as Omar did. Better to handle any newbie with care (including myself) until at least established that he can take the general tone of the forum. However if one starts lashing out with no apparent reason, you should intervene again.
Some of Omar's insults may not make sense to westerners but knowing people and culture in his region, calling someone a dog or insulting someone's mother is the strongest possible type of insult one can throw to another, though I admit we Turks are somewhat more creative in those regards than Egyptians are
He can not do such a thing in real life on the streets of Cairo: he would be buggered, stabbed, shot, beaten to death and not necessarily in that order. I don't know what caused it, someone must hit a nerve or he was just having a bad week, but he never stopped then on. He not only started a new thread full of insults, he started to tail other ones and things got out of control quickly. Nobody here needs that kind of BS, it's good that you stepped in.