Locusts. Property values aside, they move into a new area, infect it with their enlightened liberal "values," vote for the same kinds of people who ruined the state they left behind, and trash everything they touch. They refuse to learn and blame everyone around them for being "intolerant," when what they really are is defensive.
To all you Californians coming from crap (literally) areas, New Yorkers, Illinoians, Virginians (that exodus is bound to start soon,) and others escaping failed cities and states to where we have built comfortable living and thriving economies: leave your voting and moral (or amoral) habits behind, open your eyes and ears and learn. The places you are going are successful for a reason, and the places you are leaving behind are failures for a reason. Learn the difference.