"The Messenger of Allah [SAW] said: 'Do not revert to disbelievers after I am gone, striking the necks of one another (killing one another). No man is to be punished for the sins of his father, or the sins of his brother.'" (Using translation from Nasāʾī 4127)
قَالَ رَسُولُ اللهِ ﷺ «لَا أُلْفِيَنَّكُمْ تَرْجِعُونَ بَعْدِي كُفَّارًا يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ لَا يُؤْخَذُ الرَّجُلُ بِجَرِيرَةِ أَبِيهِ وَلَا بِجَرِيرَةِ أَخِيهِ»