Prophet Muhammad (PBUH) treated them with respect and compassion, all of the daughters were Muslim before Islam came, he would treat them when they were sick, even at most difficult times. He would say things to make his daughters happy and welcome them warmly when they enter his house. There was a story of Prophet Muhammad (PBUH), he was exhausted. His daughter came into his house, when she got into his house he got up immediately to greet his Daughter. He offered her his seat and comforted her. If Islam was promoting or was a terrorist religion, Prophet Muhammad would’ve not done good things to his daughter, brain wash etc.