I don't want to be friends with someone who claims to have aspergers / autism
Why would you decline to be friends with somone with autism?
I hate that they can't act normal.
You may feel uncomfortable with people who are different from you, but it is important to stretch your horizons. You should not automatically hate anyone for things outside their control. It would be good to try to make friends with people with autism; you might be surprised how similar they are to you.
I doubt they are similar to me.
You never know, not every ASD case shows the same symptoms. There are severe and mild cases and everybody also has a unique personality. Did you know some of the smartest people on the planet have Asperger's?