I don't see a lot of animosity between anime and cartoon fans, there is some, i'm sure, but its calmer now. And the animosity that does exist is primarily because of what someone earlier said, they are targeted at different groups. Cartoons in the U.S., while they may occasionally be enjoyable to the older crowd, are primarily aimed at a younger crowd. Anime can be for older or younger. The only problem I have with animation for the older crowd in the U.S. is that its pretty cheaply done. South Park, Space Ghost, etc. Neither of these cartoons offer any beautiful animation or design that goes into anime and many cartoons for kids. It makes me a bit jealous of kids entertainment and prefer anime slightly more than western cartoons, but I don't get in fights over it or anything like that.
RogueMartian, Prisoner of Circumstance
I'm gonna sleep this off like a baaad hangover
"Cuz, y'know, nothing says stealth like neon-friggin'-orange." -Conekiller