Deep breaths, guys. Deep breaths.
Mr. Self Destruct, surely you can see how:
"Right, everything that either conflicts with your views or serves to disprove you is nothing but propaganda being perpetuated by Bethesda for no reason other than to mislead their fans. It's not like you could play Oblivion or anything."
can be interpreted as dismissive. You might not have meant to be offensive with it, but you essentially told Ozan that he doesn't know what the crap he's talking about. And, as everyone here loved TES enough to get on a forum and talk about it, I think it's fair to assume everyone has familiarity with at least Oblivion. Suggesting he doesn't, in a rather brusque way, has a lot of implications to it, perhaps most importantly in this context that:
A) You know more than he does
B) That makes what he has to say invalid
Perhaps you didn't mean that; in fact, you probably didn't, because rudeness is more often born out of carelessness than malice. It does happen, but the proper response is to apologize for giving offense, not digging your heels in deeper. Regardless of intent, you obviously upset him, and we, as civilized people, should strive to correct when we give offense
Regarding his tendency to post in character, well, you should have caught on to that. Ozan has a very different writing style OOC and makes it clear by posting in parentheses, which he's done quite a bit over the last few pages so it's not like it's obscure knowledge. This compounds on the above remark, by implying that you haven't even really been paying attention to Ozan's posts. From where he's sitting, don't you think that it's offensive to be told you don't know anything by someone who clearly hasn't followed your arguments?
Now, Ozan, sadly, in the interests of fairness, I can't let you off scot-free.
First off, I can't fully empathize; I'm one of those people from a privileged upbringing, and the closest I've come to persecution is when acquaintances make racist remarks about "towelheads" and how awful Muslims are and I have to coldly enlighten them that my grandfather is a Muslim immigrant. It's temporarily uncomfortable and awkward, but the truth is I myself am unquestionably white and solidly middle class, and live in a northern US state where so is the vast majority of the population. I am not am object of prejudice.
With that caveat, I do think you came back swinging too hard. Hostility met with hostility engenders yet more hostility, and while I certainly agree that Mr. Self Destruct was out of line, I do not think he provided enough information for you to make those rather sweeping assumptions about him. At that point, aren't you just returning what you believed you received, negative generalizations on someone you don't know? I'm a strong believer that, if wronged, one should elevate their detractor to one's own level rather than sink to theirs.
I can see how your experiences may have jaded you and perhaps taught you to lead with a strong counter, but in this context, I think a gentler, more informative rebuke would have been more effective. You don't go after a screw with a hammer, etc. etc.
Sorry to get involved in your guys' personal dispute, but I thought maybe an outside perspective might help take the edge out of it.