Otherisation makes people feel vulnerable – they are made to feel powerless – and it forces them to build walls around them to protect themselves.
I have seen it among non-white English people and I see it between us among in the UK. Groups within groups within groups.
I too find it very hard to talk about otherisation without feeling defensive and vulnerable. Apparently, you can’t break through it by being too appeasing and agreeable, however. That means that if you want to unite people, you will likely draw anger and other negative feelings first.
Not an easy position to be in for anyone.