You would think that Safie's father would have been happy to have her marry Felix De Lacey. After all, Felix has been very good to him. He is helping Safie's father escape from France after he has been convicted and sentenced. In addition, Safie seems to be very much in love with him. Finally, Felix is a high status man with lots of money.
But there is a problem. Safie's father is a Muslim. He is very strongly opposed to the idea of his daughter marrying a Christian instead of a Muslim.
He loathed the idea that his daughter should be united to a Christian
Because of this, he decides against letting her marry Felix.