Honestly, his supporters are better than Cruz or Rubio supporters.
Cruz isn't a joke, but he's a snake. I'd rather the joke please.
No, Trump supporters are far far worse than Cruz supporters. I'm a liberal and I disagree with Cruz about almost everything, but he's a smart guy who articulates a coherent and well-considered vision of governance. He has genuine substance, and many of his supporters know what they're getting when they support him. They're able to defend their candidate with intelligence.
Trump supporters are irrational, bottom-of-the-barrel morons who vote for a candidate for completely dumb and superficial reasons, and are unable to defend their support for Trump beyond gut feelings and juvenile impulses. And when you point this out, they refuse to listen to reason. They just reinforce their stupidity. They are far more embarrassing for the country.