Type 'why are [group] so' into Google and see what you get in autosuggest.
I got:
redheads: angry, weird, unattractive, fair skinned
geeks: unpopular, cool, hot, often atheist
disabled people: mean, happy, so...cially excluded
husbands: annoying, selfish, mean, lazy
wives: annoying, mean, boring, stubborn
children: annoying, stupid, rude, noisy
grandparents: important, mean, special, annoying
(it seems everyone in a family is annoying!)
f1 drivers: short, fit
musicians: hot, weird, sexy, skinny
artists: pretentious, weird, depressed, sensitive
That'll do for now. It kills time, anyway!