I don't get it Mas - usually you're a pretty even keel poster, what's with the attitude towards this guy? I may have missed some interactions you guys have had recently or something, but this emphatic a response seems uncalled for, from my perspective. I do agree that this topic has been discussed ad infinitum, but that doesn't seem to be your main point.
It didn't seem to me like a baiting thread. Sure he provides some options, but he's observing a trend in the way people talk here (and definitely summarizing it with a bit of hyperbole) and asking why people might feel that way. Do you mean he's baiting Lance fans? Because if that's the case, this seems pretty tame compared to what a lot of people say about Armstrong. I don't see how asking questions like this is much different than offering a poll on, say, 'what teams do you think are doping?' and then providing answers for people to discuss.
I could see why you might say 'this has been discussed here' with a link, or even 'hey this seems like baiting' (even if I don't think it is), but after that first response, why would you respond again instead of either sending a PM or reporting to a mod if you think he's baiting (ie. breaking forum rules)?
Anyway, in answer to the OP, I feel like the reason he gets more flak, in terms of volume of dislike as well as intensity from individuals, might have to do with the fact that he got so famous from it. I mean, he's one of the most famous athletes on Earth. Before his TdF reign, what cyclist could say that? Cipo was the most famous cyclist of the late 90s I'd say, but wasn't a household name in non-cycling markets. I'm sure people knew who Indurain was, and Lemond, Hinault, and yes Merckx, but none of them have gained the fame and fortune of Armstrong. Even before I really knew about doping I disliked him enough for the fact that he was so famous and powerful but seemed to have no respect for anyone else. From a doping standpoint, I could see how people would be upset that he attained that level of fame while doping, and even moreso when given the facts that a) the sport was possibly in a moment of real change after Festina (debatable) and he set it back, and b) he repeatedly lied, spun to the press, acted the bully to others, launched lawsuits, ruined lives.
Anyway, I think that covers the major factors.