A girlfriend of mine was worried about the Tea Party, whenever that was peaking. I said "Don't worry, these people are fundamentally not interested in cooperating." I thought when Tom Tancredo's bid to be the GOP nominee fizzled in 2008, we were past the visceral hatred of immigrants. Well, I was wrong. Maybe. We'll see. Conservatives talk about the left as if they are all insane, but I think their misguided attempts to roll back the clock will be exposed, somehow, as a malignant fantasy. Humans seem to have 2 competing instincts: conflict vs. cooperation. I hate to believe that future will be a planet dominated by openly anti-democratic "strongmen," but it seems were are moving that way. However, I suck at predicting the future. Also, I believe unintended consequences have a way of blunting the effect of any particular movement. My state went for Trump but also passed a fairly carved-in-stone guarantee of abortion rights, in some cases actually expanding on Roe v. Wade. I don't think it's possible to turn back the clock on "globalization" - IOW, recognizing the fact that the planet is actually one place, very close to being a contiguous land mass.
I don't understand the hatred of immigrants. The U.S. birth rate is down; so actually is Mexico's, although not quite as much as the U.S. Both are below replacement rates. We need more young people in the workforce but can't yet bring ourselves to legalize even the immigrants brought here as small children. The right cheers at "mass deportations." Trump will give them the optics they are looking for. But the nativist movement has a life of its own; it might have taken a Trump to consolidate that sentiment but nostalgia is apparently a hell of a drug. It's a losing cause, IMO, but I don't know if it will tip in my lifetime or not. On the other hand, it could all change tomorrow, or at least, the change might *look* sudden.
I mean, painting the border fence black? I made an unauthorized comment on r/conservative pointing out that gloves exist. Labor will migrate to find jobs and in many cases the fence is a tiny obstacle compared to what some go through on their journey north. And, I hate to generalize too much but overall I like immigrants more than the U.S.-born nativists who think that being born in a certain geographical area makes them superior and justifies their "screw the rest of the rest of the world" attitude.