They thought they'd benefit from the cessation of all the handouts they imagined their hardworking immigrants were getting. Surely no one will detain or terrify your hardworking immigrants away from working hard at low wages and no benefits so you can brag about bottom line.
Nope. No transfer of (more) government benefits to you because eliminating imaginary handouts yields no money. Oh, and your labor force is diminished or gone altogether.
You bought into the fear and hate of brown immigrants. You voted hate and fear. You delighted in cruelty towards them. Now, dumbass, you wonder why they're not coming around like they used to. You villify people who come here, work hard, and send money to family in horrible places. You ever try that, dickhead? They're largely better people than you. And me for that matter.
You didn't make a political or policy decision while deciding your vote. You voted your spittle.