Trump’s basic campaign message was that there is a world of Bad Guys and you need Daddy to protect you. Protect you from whom? Latinos, Muslims,
Jews Globalists, and Black people thugs. The cornerstone “policy” (if you can call it) of his pitch was The Wall, which won’t work in practical terms or in theoretical ones, either. As long as there are Bad Guys in the world, Trumpian-style politicians will always want to be Daddy. Their worldview depends on this dynamic existing.
Let’s say that The Wall does get built and it works as Trump imagines it will (it won’t). What then? Will the alt-right consider it Mission Accomplished and go home? Of course not! There will still be Bad Guys in the world, and they’ll still need Daddy to protect them.