This is why I mentioned all these things; I didn't mean to imply all of them, sorry if I was unclear. But all I'm saying is, people like to feel part of a group, and if they don't share any of these things, or even just one, they can feel isolated and without an identity. Such has led in part to my decision to convert.
There's a difference, though, between a personal sense of or need for belonging and larger national or international cooperation or formation of legal bodies. I agree people do need a sense of belonging. And individuals are free to personally associate with those they choose, in their local communities. But that's a very different issue than what national or international policies should be.