I'm not going to give an employee off on Christmas.
Why aren't you going to give the employee Christmas off?
Because I don't like that employee and don't want to let him spend time with his family.
It's wrong to let your personal feelings get involved at work. You should act professionally and just give them their time requested off.
Nah, I'm not going to do that. He can stay at work and rot.
Bosses and supervisors are seen as leaders in companies. If your employees were to find out how you treat others they would lose respect for you quickly. Do you want to be known as the cruel boss?