Tillerson was naive. Pompeo is a crook. Rubio is greedy.

Witkoff, like Trump, would sell his own mother to make money. That is why he's the de facto negotiator with Putin (birds of a feather the three of them). While they send "liddle Marco" to speak with Zelenskyy, as they consider them non important.

Rubio is not stupid, far from it. He's just very ambitious & has no self-respect, so he will abase himself as needed. To Cabello, that might look as stupidity, but it isn't. But then again, Cabello should keep his mouth shut because he's biting his own tongue; he's not very different from Rubio.