John Gill Commentary Isaiah 36:20

"Who are they among all the gods of these countries, that have delivered their country out of my hand, that Jehovah should deliver Jerusalem out of my hand?" — Isaiah 36:20 (ASV)

Who are they amongst all the gods of these lands, that have
delivered their land out of my hand ?
&c.] Not one of them, it is suggested; why then should it be thought practicable, that the Lord should deliver Jerusalem out of my hand ?
thus blasphemously setting the Lord God of Israel upon a level with the fictitious gods of the Gentiles; though these could not, the Lord could, being the Lord God Almighty. If Rabshakeh was an apostate Jew, he must have known better; but the malice of such is usually the greatest.