Adversaries - i. e., the Samaritans, a mixed race, partly Israelite but chiefly foreign, which had replaced to some extent the ancient inhabitants after they were carried into captivity by Sargon (see 2 Kings 17:6 note).
Related Commentaries of Ezra 4:1
Ezra 4:1
1 Now when the adversaries of Judah and Benjamin heard that the childrena of the captivity builded the temple unto the LORD God of Israel;