I have no respect for the positions of Trump voters, but I can give some of them the benefit of doubt on whether they believe he'll actually pursue mass deportations against people like the family featured in this article. The question is how they will respond when he does, and if they're capable of learning anything from the experience.

His Family Voted to Support Trump’s Deportation Plan. That Includes Him.
His friends and family members in Rome, Ga., voted to support mass deportation. Now he’s scrambling to stay in the country.
nytimes.com