Here "led astray" is a metaphor for being persuaded to do something wrong. Being led astray to idols represents being wrongly persuaded to worship idols. The phrases "were led astray" and "you were led by them" can be stated in active form. AT: "you were persuaded in some way to worship idols who cannot speak" or "you believed lies somehow and so you worshiped idols who cannot speak" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-activepassive]])
Possible meanings are 1) "no Christian who has the Spirit of God in him can say" or 2) "no one who is prophesying by the power of the Spirit of God can say."