ANSWER:

They must sincerely repent to Allah and never do such a thing again and Allah will forgive them if the repentance is sincere.

Sheikh……in our relatives house, onam feast was made and eaten by them…..onam is a non-muslim festival. Sheikh, is this kufr or shirk what they have committed….. they won’t repeat it….they have been making this feast since childhood because of being an Indian.

Shirk and its different forms | September 3, 2020 7:53 pm
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If someone does shirk and kufr…all good deeds will be erased when he is alive like suddenly at the moment he did or because he didn’t repent and died his good deeds will be erased?
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Sheikh as a Muslim political leader of a state, one has to accept the invitation to attend the other religious programs offering of light,flowers, and water or food for those who believe divine, how he can deal with such situation as fellow Muslim brother’s say he has lost faith in Islam ,even though being a good practicing Muslim.