(1) It is lawful for non-Muslims to deal in wine and thus its earnings are Halal for them. If they have started the airline with this income then it is from lawful earnings. It is permissible for Muslims to travel by their airlines. (2) We do not have details about Dr. Zakir Naik, only we know that he is an agent of Ghair Muqallideen, away from knowledge and wisdom, spreading mischievous things and misguiding simple Muslims to wrong path.