I hate my youngest child for having dark skin
Why would you hate your kid's dark skin?
I hate his father who had dark skin like that.
You have bad feelings about your ex it seems. In what way does your son have to suffer because of your bad choices in the past. He will grow up resenting you for the unreasonable hate and blame you have for him.
Hello, it's my right to hate who I don't like and that kid is always going to have the same dad who I hate.
Hating your child is a terrible thing to do especially when it is over a trivial matter like skin color. You are showing prejudice towards your ex and your son that isn't appropriate here. Let go of your animosity and love your child.