What does Ezekiel 23:1-10 mean?

The word of the LORD came to me: “Son of man, there were two women, the daughters of one mother. They played the whore in Egypt; they played the whore in their youth; there their breasts were pressed and their virgin bosoms handled. Oholah was the name of the elder and Oholibah the name of her sister. They became mine, and they bore sons and daughters. As for their names, Oholah is Samaria, and Oholibah is Jerusalem. “Oholah played the whore while she was mine, and she lusted after her lovers the Assyrians, warriors clothed in purple, governors and commanders, all of them desirable young men, horsemen riding on horses. She bestowed her whoring upon them, the choicest men of Assyria all of them, and she defiled herself with all the idols of everyone after whom she lusted. She did not give up her whoring that she had begun in Egypt; for in her youth men had lain with her and handled her virgin bosom and poured out their whoring lust upon her. Therefore I delivered her into the hands of her lovers, into the hands of the Assyrians, after whom she lusted. These uncovered her nakedness; they seized her sons and her daughters; and as for her, they killed her with the sword; and she became a byword among women, when judgment had been executed on her.

English Standard Version (ESV)