Therefore thus says Yahweh: 'Your wife shall be a prostitute in the city, and your sons and your daughters shall fall by the sword, and your land shall be divided by line; and you yourself shall die in a land that is unclean, and Israel shall surely be led away captive out of his land.'"
They've become so crooked. God laid the plumbline in order that, of course, the purpose of the plumbline is to make the straight corner, the straight wall. God held the plumbline and He could see the crookedness, the perversity.