if you want my take on this as someone living in japan:
it's completely different over here. ever heard of a Fox main named Masashi? of course you have. masashi is also known as Tama, probably the 2nd or 3rd best May player in the world (GGXX) and is also incredibly good at blazblue. also, i spent the weekend at a peach player named D2's house with Tani, the best japanese player. when i woke up at 8 in the morning, Tani and D2 were playing fate: unlimited codes. smashers over here play a lot of other games, and there's no disrespect between fighting games. there isn't even disrespect between melee and brawl, really. all the melee players hang out with all the brawl players, and vice versa. you wanna know ALL IT IS?
most american gamers are not very good, and most american gamers are pretty childish. most of the capcom series fans you see on the internet that hate on smash? newsflash: they hate on EVERYTHING. marvel, vs series, airdashers. and marvel players hate on sf, and sf4 players hate on 3s and vice versa. fighting game players are some of the most childish people on the internet, and most of them aren't very good. the good players are usually pretty okay with other fighting games.
i went out to dinner in seattle with the sf4 community and we had a good talk about melee, brawl and sf4. turns out people who actually go to tournaments, and are actually good at their respective game, have worthwhile things to say. who knew
so yeah uhhhh the next time you see someone post some stupid **** on the internet about why a game [that isn't brawl] sucks, don't get upset about it, and realize that person went and posted a bunch of dumb comments about daigo umehara on youtube the very same day
anyway, people generally stick to their franchise. there are a few of these: street fighter (includes cvs), marvel, airdasher (read: anime fighter), smash. that's why you see SOME overlap between various street fighter games, SOME overlap between melee and brawl, SOME overlap between like, blazblue players and melty players. etc. same reason melty blood showed up at evo. because all the airdasher fans pooled their votes for it.
people are generally gonna stick to their franchise unless there's a very popular or big movement going on. it takes a lot of hype to get people to cross franchise boundaries, and the simple fact of the matter is, most popular fighting games are PRETTY GOOD GAMES, so most people don't have a reason to switch. like, if I was HELLA ****ing good at sf4, i would just keep playing that, cuz sf4 is a good game lol.