Dr. Zakir Naik is known for his lectures around the world, he travelled to many countries and gives lectures and answers the questions of non-muslims about Islam.
In his tour to Nigeria he was asked what will he do if his son or daughters leaves Islam and accepts another religion? Will he disown them?
But if we suppose hypothetically that they leave Islam then Islam asks me try to answer their misconceptions for which they left Islam. If after that they didn’t revert then I will disown them, because that’s what Islam asks us to do and that’s what Allah asked Nooh (a.s) to do to his non-muslim son.