I don’t think that’s the whole story though. The migrant “crisis” is animating a lot of voters despite migrants having little impact on the vast majority of people‘s lives. People tend to assign outsized risk to the unknown/unfamiliar and vice versa. Nothing is more comfortingly familiar to the typical Amerikkkan than their oversized house kept at 65 in the summer and 75 in the winter with three giant SUV’s in the driveway that they drive everywhere on clogged stroads.