I'm thinking of inviting everyone except my sister to Thanksgiving
Do you have an issue with your sister?
Yes, I hate her and I hope she ends up alone and miserable.
There is nothing wrong with you for not liking your sister. Some people are fortunate to have siblings that they get along with really well, other don't but it's wrong to hate your sister.
Why?
She is your family member. You don't have to like her but hate is a strong word. Why would you hate her?