You really do sound bitter to be honest.
But look, it's quite simple. A certain percentage of fans will always be blinded by their loyalty to their favorite athlete or team. Maybe it's something innate in us, or maybe it's how we're raised. (Think high school pep rallies, and fighting kids from a rival high schools football team.) So sure, these people can be obnoxious as hell. But that doesn't mean you respond by (a) fighter bashing, or (b) trolling everyone else. And in the case of (a), you especially don't do it to incredibly, universally respected sportsman like Fedor. It's just trashy at that point.