Well, really, nobody is asking you to get it. I don’t mean to be snippy, but there are zillions of things in this world that don’t turn me on, but that might turn you on. I think that it’s healthier to let people enjoy the things they like. As long as everyone’s consenting adults, and there’s no lasting injury, what’s the harm?
I think that hentai and furries get beat up on more often because they’re more popular in nerd or geek subcultures. Lots of people are turned on by criminally enlarged breasts, which I think it much more bizarre and dangerous, but I’ve never heard anyone make fun of or express disbelief regarding these people or their fetish.