السلام عليكم A family member of mine is a Hafiz and often leads prayer and taraweeh but they reject all Hadith and believe that the nabi صلى الله عليه وسلم is not the last and final prophet, can I pray behind him? If I don't then it may cause hatred Also should I tell others to not pray behind him?

Ustadh AbdulAziz al-Haqqan

Avoid praying behind him.