I guess people aren't allowed to like and purchase Apple products nor are they allowed to celebrate Apple on an a dedicated Apple enthusiasts board without being labeled an iSheep.
Sure people are allowed to do so...BUT...when doing so with blind religious zeal some other beings may object.
As someone being somewhere in the middle, I do like lots of apple products but that does not make me close my eyes to some of teir shortcomings. (for example I like my iPhone as it (currently) gives me the best overall experience, but I still realize that the notification center is sub par at best, Safari can not keep 2 pages in memory and audiobook handling has become more and more useless with each change made to the music app)
Maybe, what you perceive as Apple hatred is just the frustration of some people on this forum, that a company that traditionaly is very good at taking existing tech and recombining it to a superior user experience, is loosing that edge by changing it's attitude from "well, you may have heard of it but we made it soooooo much better" to "this is new, no one has ever done anything like it...ah, and we invented fire and the wheel too".
Again, I realy realy like some if not most Apple products, but somehow the current way of doing business and developing products somehow seems to show negative effects on those products (more bugs in iOS and OSX, Form over Function Designs [I guess no iPhone user would have minded if it did not get 2mm thinner and instead got a bigger battery so heavy use would not create the necessity to load that thing during lunchbreak)
To sum it up in one sentence: I only pick on Apple because I know in my guts that with just a little bit less self-centeredness they could deliver products that are so much better then they already are.