Bede

The enemies of Judah and Benjamin heard, etc. The history is known; because it speaks of the Samaritans, the enemies of Judah and Benjamin, whom the king of Assyria transported into their cities and lands from various nations of the ten tribes in captivity. These, after receiving the law of God, partially observed it, while still serving the same idols as before. These people, regarding the true worshipers of God with disdain, promised them help with the work, intending to bring about harm once accepted into partnership. …

Commentary on Ezra and Nehemiah ↗