They are convinced they are god's chosen people and that everyone else is vermin they have the divine mandate to step on and ruin. That's why they would have a cycle of being kicked out of a country and moving to a different one that didn't get the memo, but that strategy which has worked well for thousands of years is not battle tested against a global communications network where people can be instantly made aware of what happens on the other side of the globe.
At this point the only reason why we haven't had a real Holocaust in the past twenty years is their extreme control over media and communications - control that is slowly slipping as their brainwashed sheep die of old age and newer generations have grown up indoctrinated to their propaganda.