Why Trumpian immigration enforcement isn't really conservative

I've heard about this before, but it still astonishes me:

Border Patrol officers are working without permission on private property and setting up checkpoints up to 100 miles away from the border under a little-known federal law that is being used more widely in the Trump administration’s aggressive crackdown on illegal immigration. 

Trump administration officials defend the government’s decades-old authority to search people and property, even without a warrant, far from the border. They call it a vital part of preventing weapons, terrorists and other people from illegally entering the United States. 

An estimated 200 million Americans live within 100 miles of the border, according to the A.C.L.U. At least 11 states — mostly in the Northeast and Florida — are either entirely or almost entirely in the 100-mile radius.

Conservatives talk about liberty and rule of law a lot, but what they're doing is giving police virtually unfettered power over much of the country. At the very least, they owe an accounting of how this squares with their limited government rhetoric.