Probably not hate, but just not the free respect that the TMA'ists used to get when they say they're a Black Belt in whatever, like it often was in the Pre-UFC days. People saw what happened in UFC 1-4 and even 5-15 or so....then it started to filter down to BJJ + Muay Thai, or die.
I agree with the history, but I'd actually bring in what Drop & KangSooDo were talking about in that other thread about the training.
Prior to UFC, very few, and I mean Very Few people actually trained to get in a ring with another bad dude, or lady, and attempt to defeat said other bad dude/lady witht a set of skills that the other person also knew or was likely to know.
UFC was a fight laboratory, plain and simple. I do not carry that to the premise that you did there, Fried Rice, though I agree with the outcome, that in the UFC you had better have had some serious BJJ with Muay Thai training or you were going to be pasted.... Rather, I think that BJJ regular rolling full-tilt boogie lends itself seamlessly witht he UFC style of fighting.
Let's not forget that the Gracie's invented the entire concept of the UFC... and what did they do regularly? Fight just like the UFC at home in Brazil. So that's the grappling side.
On the striking side, Muay Thai is as close a parallel to the type of training that BJJ uses on the ground when translated to a stand-up striking art, i.e. it's all about conditioning, lots and lots and lots of sparring work at high intensity, etc.
What I think is, that if you could get a Wing Chun school (I just pulled them out of the hat because so many of y'all seem to either be, like, or like to talk about WC folks) to train what they do as if they were Always and Only going to be "Duelling" in a ring, or Octagon, or box or cube or parking garage, or emptied out swimming pool (Lionheart, hey... I enjoyed the JCVD movies, cheese sauce and all) with the steady feedback of the trainers (I sort of think that this is/was Yip Man's method, eh?) you'd end up with some very formidable UFC competitors. We already know it doesn't Have to be BJJ, it could just be plain old Judo (see Ronda's success, eh?) and I'd bet that if you took a physical specimen such as a Spetnaz, gave him the mission parameters of the UFC duel thing, he could bring Sambo and Systema to bear in a very effective way.
TO Drop's ever-pervasive point which he thinks, incorrectly, that we all dispute, it is "Training over technique."
Train Right, Do Right. (Maybe I should have stuck a Daniel-san on that, but it's not Miyagi's quote, it's mine so there.)