'You'd all still be living your miserable lives thinking you're "better" than everypony else if it weren't for my magical abilities! I brought you friendship! I brought you equality! I created harmony!'
'But we aren't equal. I can't fly, or cast magic!'
All it took was one idea, half formed from a pony, to bring the entire mob around. Realising their error, they looked to the wings on their back, the horn on their head. Cutie Marks were one thing, yes, but if it required a unicorn to cast it, where an Earth Pony or Pegasus could not, how could they be considered equals?
That was how it started.