Oh, it's easy, they're psychotic predators who have no empathy.

That's why it's so easy for them to lie, and it's why they were selected by the billionaires who hired them to hammer in the final nail in democracy's coffin. They feel no guilt. There's nothing going on behind their vacant eyes except how do I make the people that pay me the real money, (not the tax payer dollars that pay their six figure salaries, that's pocket change by comparison.) happy.

The author of Friendly Fascism predicted this and tried to warn us over 40 years ago, but nobody really paid attention.