Your buyout idea is good in theory, apart from including misgoverned Muslim countries like Libya and Algeria in destinations for bought out Gazans to move to. Also, the billionaire Doha resident leaders would never agree to shutting down their mafia with a green jihadi flag business.

As Yogi Berra, said, in theory there's no difference between theory and practice. But in practice there is.

In June 1941 Hitler invaded the USSR to violently grab what Germany had been buying under very favorable terms in order to get theoretical "Lebensraum" very few Germans were interested in moving to.

It's amazing how humans with ideologically or theologically driven idiocy in their heads will engage in self-destructive behavior.