Why do so many of the groups I associate myself with see themselves as superior to the rest of humanity? — Maybe they are.
Nah, just kidding. Even though I sometimes fall into that role, I avoid being the Apple fanboy. Likewise, if you are a religious omnivore, you should consider my atheism and veganism as alternatives, but I haven't figured everything out. My only goal is to be superior to my past self.
I make decisions because they work for me. Even in ethics, I can't tell anyone to value the same things that I value. If you have the same values, I can only suggest you change your beliefs to fit those values better.