Dealing with a person whose sin repeatedly hurts one

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Can we sit with those who do not pray?
He is being asked to denounce evil by e-mail

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Related Answers:
Ruling on passing through places of evil
He looks for bad sites to send them to the centre which will block them. Is this good or bad?
Going to public places in which there are evil things [munkaraat]
Can we sit with those who do not pray?
He is being asked to denounce evil by e-mail

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