There are ways to present every viewpoint in a respectful manner. I didn't see what you wrote, but if Dids edited it, I'm left to assume that it was unnecessarily antagonistic.
I don't think there's anything here specific to Brony's; why the kid was bullied is irrelevant. If a bully wants to bully you, he'll find a reason. Some people are more emotionally equipped to deal with it than others. The simple fact of the matter is that not all people have the same tolerance for suffering. I don't like this particular story simply because it serves to further sensationalize the 'brony' phenomenon. Because, well, it isn't. It's nothing. It's just people who like a show. By calling themselves bronies, it somehow takes on greater meaning and contributes to their own separation from what is considered 'normal'.
This has two effects. On the one hand, people who label themselves as such feel a bond with each other, feel like they are part of something, feel like they are a little bit different and special. On the other, people see the label and because it's not something they understand or are a part of, they ridicule it. As far as I'm concerned it's a cartoon with a positive message, it's well written and well done. It's geared towards girls, sure, but it's message is universal and not at all gender specific. Some males young and old like it, some don't. Some girls like GIJoe, some don't. Whatever, who the fuck cares. I loved nothing more than the Joy of Painting with Bob Ross. No one is defined by the shows they watch, unless it's child p0nr or something equally heinous.
As for the broader topic of bullying, it has gone on forever, but that doesn't make it right. At the most basic human level, most of us know right from wrong. When you see a tough guy, picking on a weaker kid for his own amusement, it's fucking wrong. Don't tell the victim he needs to toughen up, pick the ass hat up and slam him on the ground.