A lot of our current brand of conservatism appeals to people's notion of unfairness. People taking things from them. They have been told over and over that liberals are lazy and want to take things from them.
Remember that these are young people who don't have a lot of experiences in adult life, but have experienced basic, uncomplicated unfairness. Fighting against that simple, unnuanced unfairness appeals to them.
Conservatives tell you a whole list of people who are supposedly stealing from you to distract from the fact that they're currently picking your pocket.