I simply don't see why people hate on Bronies.
They're not horrible people, they're just are fans of a TV show. It's not like they're cannibals or something. They're average people with different tastes than others. Would you go into an all caps rage at someone because they liked Chinese food and you didn't? Of course not. Bronies are the same way.
Another thing, the Bronies are NOT THE FREAKING BORG. They're not trying to stuff people into their ranks. They're not trying to pressure you into becoming a Brony. They're not trying to convert you into Brony-ism or whatever. They're just existing. From what I've seen, Bronies never bother a soul about the show or the characters or anything related to such. All they do is do what any fan of anything would do: mingle among other fans. When they step out of that circle, the curled purple wig and tail come off, and they don't act like enthusiastic Bronies anymore.
Bronies are not the vile scum people say they are. They're just different.