ANSWER:

The imam must repeat his prayer and repent sincerely as this is an act of apostasy as some scholars say. The people behind him must not repeat their prayer as they didn’t know and their prayer is valid 

If an imam deliberately leads people without in the state of wudu, will the congregation have to repeat the prayer? And how the imam can expiate for this sin?

Prayer | June 25, 2018 7:29 am
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In one of your recent clip abt rolling pants in salah I heard and I heard you saying that when we are offering salah we must not fold our cloths or tuk it in..so my ques in is sometimes when I wear full sleeve shirt I foldy sleeve and I even in my shirt…so when I want to offer salah should I make it free??
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I made a lot of dua during Ramadan and Umrah asking Allah to forgive me for missing salah my whole life. But while in makkah (after umrah) I became very sick. ‘cuz of this I missed Salah for 3/4 days, and the salah after I became a bit better was on and off. I heard from a scholar that you should do your shahada once again. I did it. Are all my past good deeds erased because of this?