I'm afraid of appearing racist.
Why are you afraid of looking racist?
Because I say what I think.
It's wrong to be racist. Being racist dehumanizes people and causes people great harm. You need to be more open minded and rethink how you view people.
Don't tell me what I can and cannot say.
I certainly don't want to tell what you can or cannot say, I'm merely suggesting that you shouldn't be racist as it can be very hurtful for people. You shouldn't hurt people and it's a good reason to think first before you say something.