Not gonna read 5 pages of probably the same arguments, so bet someone already pointed it out, but people have aversion to races that even remotely look "fat". Imo Dwarves don't look "fat", they look tough and stocky, but they're completely opposite of the "lean" races like Elves or Forsaken that are popular.
Every time there's a discussion about Dwarves, Pandas or Kul Tirans it always ends up as "eww fat".
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How is it stupid? Someone said in the discussion about Mechagnomes on wowhead that people would play a walking turd if it had OP racials, that's what sounds stupid to me. Unfortunately it's probably true.