I have a phobia of fat people and they seriously make me uncomfortable. Being squished in between two fat people on the subway is actually the worst for me.
Would that mean that if you were a fat person you couldn't stand yourself?
Yes, I can't stand it. I feel like I'm going to be crushed
You shouldn't  be judging people based on their weight. That's something that many people struggle with and is hard for them to manage. Just because someone is fat doesn't make them a bad person.
I just can't get over it.
Then you may need to see someone and figure out why that is. Because what you are doing is wrong.