It can be a trying task being a fan of something at times. And by "fan" I don't mean "rabid, frothing fanboy/fanmadam" (thanks NISA); I mean simply someone who has a particular preference for something, and who will, in many cases, indulge in that thing to the exclusion of other, perhaps more "mainstream" things.
Since pretty much "coming out" as a fan of visual novels, anime and associated goodness around the time Katawa Shoujo was released, I've run into this issue a number of times. In the case of Japanese entertainment, the cultural rift between East and West means that some people are less than understanding about certain aspects of what our friends in the East produce.
And perhaps that's understandable in some cases; even as a fan of a broad spectrum of Japanese entertainment, I'll happily admit that there's plenty of content — primarily around the area where sex and violence cross over — that makes me uncomfortable, and so I deliberately choose not to expose myself to that sort of thing. ("Discovering" Urotsukidoji in my teens was quite enough, thanks.) It exists, though, and I can deal with that; it's simply something I choose not to engage with. (I also don't believe for a second that it's actually harmful — to believe as such is to show an alarming lack of faith in humanity's ability to distinguish between fact and fiction, and a similarly alarming willingness to believe that everyone is stupid enough to just want to emulate everything they see. Sometimes fantasy is just fantasy.)
The trouble comes when people start to assume the worst about an entire culture's output based on some of its more questionable or discomfort-provoking aspects, or even, in some cases, based on things they just think they know — the "lol Japan" approach.
Let's take the recently released Senran Kagura as an example. Here we have a game that explores and respects its characters in great detail — going so far as to give each and every one of them their moment in the spotlight in lengthy, well-written visual novel sequences — that also happens to feature characters with big jiggly boobs who occasionally flash their pantsu. Are the jiggly boobs and pantsu necessary? Of course they're not, but they don't detract from all the other good stuff that the game is doing — and frankly, what is there to be ashamed of there, anyway? Senran Kagura's cast is depicted to be a bunch of strong, independent young women who are more than capable of taking care of themselves and who are, above all, confident and comfortable in who they are and what they look like. (Those who have played it will know that the possible exception to this rule is Hibari, but her own character arc revolves around her coming to terms with her own inferiority complex; the end result is her accepting herself, flaws and all, and recognising that she doesn't have to go it alone.)
Admirable traits, I'm sure you'll agree, and so what does commentary about the game focus on? You guessed it; the jiggly boobs and the pantsu. And the aggression with which these criticisms are delivered is astonishing — take this outstandingly vitriolic takedown of the game that appeared not on someone's personal blog, but on the official Nintendo magazine's website. Or take the comments that habitually appear on any article about the game, which usually involve accusations of those who enjoy the game being "perverts" or, in more extreme cases "paedophiles". It's gross and disgusting, and it makes my heart sink any time I see it. And there's no point trying to argue your case against these people; they're people who have made their minds up about something, and have no interest in changing it.
For what it's worth, I'm firmly of the belief that there's not actually anything wrong with enjoying the fanservicey aspects of titles like Senran Kagura and its ilk; acknowledging your own sexuality is a healthy thing to do, and finding something that isn't real attractive does not necessarily say anything about your attitudes towards a real-world equivalent. Indeed, I'll happily admit to having been attracted to some Japanese titles purely by the fanservice aspect, whether it's video games or anime; in pretty much every single case, I've been pleasantly surprised to discover that beneath the often in-your-face sexuality of some works, there beats a heart of gold; in many cases, I've even discovered that the fanservice aspect is a lot "tamer" than a lot of people tend to make out, and the whole point of it is actually to tell an interesting story with some loveable and, yes, attractive characters. (There's also some stuff that purely exists to be sexy, and that, too, is both fine and can be enjoyable.)
Here's the thing: I, like, I'd wager, pretty much anyone else who enjoys anime and other Japanese forms of entertainment, am capable of distinguishing between fantasy and reality — and anime-themed entertainment is so obviously fantasy that I find it very difficult to take the more vitriolic criticisms of it seriously, particularly when they're delivered with such furious anger that it often becomes clear that the one raging has very little actual experience with the work in question beyond the most superficial knowledge — see that Official Nintendo Magazine piece.
I often find myself wondering if fans of other niche interests find themselves subject to similar scorn. Is one of my dearest friends, who is such a fan of heavy machinery (whether military or agricultural) that he describes his reaction to various hulking metal beasts in terms of how "tumescent" they make him, likewise a "pervert" for talking about things in this way? Of course not. Whether or not they really do make him tumescent is neither here nor there, and is nothing but his own business; his own personal interest in such things is something that is important to him, something that I respect and something that, on several occasions, has in fact led me to checking out things that I otherwise never would have explored for myself at all. An ultimately positive experience, in other words.
It's a pity that not everyone feels they can be open-minded about things not immediately familiar to them, and instead jump to conclusions without bothering to investigate them for themselves. It happens in all aspects of society, not just the ultimately not-all-that-important really fandoms of various forms of entertainment, and it sucks every time it comes up, particularly when I see it upsetting people I know and like. (Or when it upsets me which, I won't lie, it has done on a number of occasions.)
Live and let live. And perhaps, just once, ask your friend what it is about [x] that they like so much. Be willing to take a look for yourself and reconsider your opinion.
And if you still don't like it? Don't be an ass to people who do.