I don't want my dads side of the family coming to my graduation
Why don't you want them coming?
I don't want his parents to come, they are not scholar-like. Also, they are kinda poor
They are your family so you should have them come to your graduation. You shouldn't exclude them due to your personal feelings.
I don't like people to know I have poor people in my family.
You are being vain and petty here. Family should get together to attend special events as much as possible.