What are the foreign gods among them?
Malbim: They are thoughts of idolatry in their hearts.
Why did he call Him Elokei Yisrael?
Malbim: He oversees Yisrael. Therefore Yisrael are His inheritance; they are not under any minister [angel] or star. This is why Yisrael are forbidden to serve b'Shituf (Hashem and something else), even though Bnei Noach may do so.