I don't think you get it. I didn't ask you to be nice, I asked you to stop being a jerk. "I would say something nasty, but I promised I won't" is still being a jerk, and it's the exact kind of attitude I'm tired of from you. When you first came here, you mostly posted stupid things. But two or three months ago, you went from merely posting stupid things to posting stupid things and harassing others about posting stupid things. You also happen to be one of the people that, on average once a month, have to be told off for pretending to be moderators, telling others that they're breaking the rules and all that. As a moderator, I tend to be fairly tolerant, but in your case, I've had just about enough.
Some of the long-time veterans here get away with insulting others sometimes, because they've demonstrated time and time again that they themselves are not idiots. They've demonstrated that their opinions are worth listening to. You haven't demonstrated that you are not an idiot. In fact, you've been very keen to show the exact opposite. This will stop, now - think before you post, and if you haven't got anything useful to say, don't say anything.