My best guess is he's just an idiot and doesn't really think things through, just saying/doing whatever dumb idea pops into his head at the moment
I don't want to be confused for an Elon Musk fanboy, but he's definitely not stupid, having founded Tesla, Spacex, and other companies.
My best guess is that he wants to raze it to the ground and salt the earth on which it once stood so that nothing can grow there again. Not just destroy it, but destroy it so thoroughly and comprehensively that it cannot be rebuilt.
The exact opposite of the stated mission, as is tradition with these types of people.