מלכים ב יז:ט פירוש: רש״י

[Bnei Yisroel] fabricated. They concealed;²¹Alternatively, “Bnei Yisroel said.”—Targum Yonoson Or, “Bnei Yisroel claimed that God did not see them.”—Radak this interpretation is according to its context.

From watchtower. Which is made only to station a lookout to watch; they now erected idols in every high house.²²They denied God's Providence and adopted a new doctrine. They said that God did not see them because He delegated the heavenly bodies to supervise over the earth. Therefore they erected idols in high places honoring these heavenly bodies.—Ralbag

To fortified city. Like “from small to big.”