What does 2 Kings 18:28 mean?

Have I now come up without Yahweh against this place to destroy it? Yahweh said to me, ‘Go up against this land, and destroy it.’”’”

Then Eliakim the son of Hilkiah, Shebnah, and Joah, said to Rabshakeh, “Please speak to your servants in the Syrian language, for we understand it. Don’t speak with us in the Jews’ language, in the hearing of the people who are on the wall.”

But Rabshakeh said to them, “Has my master sent me to your master and to you, to speak these words? Hasn’t he sent me to the men who sit on the wall, to eat their own dung, and to drink their own urine with you?”

Thus says the king, ‘Don’t let Hezekiah deceive you; for he will not be able to deliver you out of his hand.

Don’t let Hezekiah make you trust in Yahweh, saying, “Yahweh will surely deliver us, and this city shall not be given into the hand of the king of Assyria.”

Don’t listen to Hezekiah.’ For thus says the king of Assyria, ‘Make your peace with me, and come out to me; and everyone of you eat from his own vine, and everyone from his own fig tree, and everyone drink water from his own cistern;