Of course it is ethnic cleansing. But in his opinion, it is the good kind of ethnic cleansing. Just like deporting immigrants, or sometimes even Native Americans...
Of course, if USA really wants the Gaza population to be displaced, it would be consistent for them to take on a significant proportion of them as immigrants.
Trump's administration should really just come up with some sort of, 'last answer'. Something cheaper than deportation, doesn't let those undesirables the opportunity to come back in, and sends a message to any other undesirables. I just can't think of what that could be. /S