Nah. I don't think I've seen that much more hate coming from Wing fans. Hell, I don't think I've ever seen anyone "throw a tantrum" over Freedom's wings.
If you're seeing anything, it's just pure statistics: In 2000, Wing fans were a tremendous segment of the Gundam fandom. UC hadn't had a main-line entry since the unsuccessful Victory in 1994, with only 08th MS Team to tide it over in the meantime. The other side continuities (AWGX and Turn-A) had failed to pick up steam.
So a fan who was active, emotionally engaged, and willing to disagree in the fandom was most probably a Wing fan.
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