OP, the title youve given is misleading and different from the article. He does not say he will refuse these flights, only that he will refuse flights where peolple are treated inhumanely.

I cannot force migrants to remain in a country that does not want them. But if that country returns them, it must be with dignity and respect – for both them and our nation. In civilian planes, and without treating them like criminals, we will welcome our compatriots.