Offering Salah behind an Imam adopting beliefs entailing Shirk

A: A person who thinks acts of swindle, sorcery and divining are permissible is impermissible to be taken as an Imam, as he is considered an apostate from Islam, and the Salah (Prayer) of an apostate is not valid, according to Allah's saying, But if they had joined in worship others with Allâh, all that they used to do would have been of no benefit to them. Sorcery, swindle and divining is considered Shirk (associating others with Allah in His Divinity or worship), as they entail seeking the help of someone other than Allah, whether Jinn (creatures created from fire) or devils.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.