People with disabilities going only in special schools here

It's not racist to put disabled people in a school for disabled people, it's actually a nice thing to do for them. A school specifically designed for disabled people can offer positive aspects like individualized attention, specialized teaching methods tailored to their needs, a supportive peer group, access to adapted equipment, and a focus on developing life skills. Honestly, schools for disabled people sound better than normal schools to me.

And sure, disabled people need to socialize, but I don't think it's really important that it's with 'normal' people. They are in special schools to learn how to be functional in this crazy world, they don't need to get hurt by rude idiots because of socializing with others.

I think another factor is, people in general don't know a lot about people with disabilities. You could say "that person is autistic/neurological disabled" etc, but most people don't even know what it MEANS.

They only see the disadvantages and base their opinion on things they've heard about the disabilities. They were never educated about the topic, so ofcourse there's going to be judgement and misunderstandings, which lead to leaving a person alone, because you don't have a clue how to interact with them.