Who likes him and why?

You obviously have very little experience with comedy.
Go to a comedy club.
Comedians use potentially offensive material. ALL. THE. TIME.
While there may be some comedians that try to play to the family crowd, most comedians are grown adults and do comedy for other adults. They do not censor themselves and are more concerned with being FUNNY than offending people.
You think "black people do this; Mexican people do this" type of comedy is offensive, edgy, or even original? Every lame hack comedian does this style of comedy, and it stopped being funny in 1978. Chappelle is one of the few modern comedians to do race-related comedy that is actually funny.
Consider this:
Mind of Mencia is on Comedy Central during prime time - there are many things that he is not allowed to say, both because of FCC regulations and Comedy Central's standards and practices. How can someone who is restricted by television be as edgy as you claim?? Answer: they can not.
And nobody is offended by his comedy, except that it isn't funny.
You fail, sir, as all Mencia fans fail.
Mencia sucks and is unfunny.

Fine, you can like him becaus he doesn't give a *beep* about offending anybody. but here's the thing, he shouldn't have to care, because he's NOT OFFENDING ANYBODY. He automatically assumes he so god damned offensive, when the only people who are uncomfortable with him are the people who haven't been paying attention to anything comedic since the 80s. The only people he's offending are Chappelle fans who are disgusted that this pile of crap replaced him.

Terry Jones is not Kosher

But it's not his opinion. He never makes the jokes personal. When he makes a racist joke (or as he calls them "a joke"), it's about the race, not about him being a part of that race, or even from his point of view. It's usually just a vague generalization.

And, as the other poster said, you have obviously never been to a real comedy show before. I used to work at the Improv, and let me tell you, there are far more risque comedians than you think and most are far better than Ned.

By the way, funny is subjective. No one has to give a reason why something isn't funny. It just isn't. I don't like the taste of broccoli. Why? Because my brain interprets the signals sent from my taste buds as unpleasant. Other than that, there's no real reason why I don't like it. Ned is broccoli.

Actually, he's not broccoli, and here's why: I dislike him because he does a dis-service to comedy and to society. It's one thing to be politically incorrect (such as Carlin). It's an entire different thing to do it for the sake of doing it, instead of actually having a message behind it. What exactly is Ned's all encompassing, enlightening message about life? That a good pseudonym for Mexican is "wet-back"? There is no real social commentary with him. It's more of a reiteration of stereotypes. That's not politically correct or incorrect: it's ignorant. Is that reason enough for you?

And yes, we will tell you you're opinion is wrong, because you were presumptuous enough to tell us that ours was wrong first, wanker.