I don't feel bad that my dad is in jail
Why don't you feel bad that your dad is in jail?
There is no particular reason behind it.
If he deserves to be there, then I understand why you would not feel bad. Sometimes, it is just best to let the courts be the ones that deal with the punishment and accept it for what it is.
What is there to feel bad about?
Well don't you at least feel a little sad that he's in prison? I'm sure you miss your dad and you should visit him sometime.