It sounds like you've been through some childhood trauma that you haven't gotten over. If possible, I would consider seeking therapy to try to get yourself past this anger and trauma. I think your life could be much happier if you let go of this anger. Not looking at people with such suspicion will ease your life a lot.

I've found the most fascinating people are those that I share absolutely nothing in common with. I learn a lot about their lives and their views, and it's often fascinating. I met one person who is a fanatic Republican, something that I don't share, and she believes in a wide range of conspiracies. I've met people on the left that also have the same level of conspiracies coming from the other direction. Talking with people who are just like me is often boring and I find I learn a lot less that way.