The sin of the person who invites others to an evil deed or establishes a bad tradition

Narrated 'Abdullah:

The Prophet ﷺ said, "None is killed unjustly, but the first son of Adam will have a part of its burden." Sufyan said, "..a part of its blood because he was the first to establish the tradition of murdering"

حَدَّثَنَا الْحُمَيْدِيُّ، حَدَّثَنَا سُفْيَانُ، حَدَّثَنَا الأَعْمَشُ، عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ، عَنْ مَسْرُوقٍ، عَنْ عَبْدِ اللَّهِ، قَالَ قَالَ النَّبِيُّ ﷺ " لَيْسَ مِنْ نَفْسٍ تُقْتَلُ ظُلْمًا إِلاَّ كَانَ عَلَى ابْنِ آدَمَ الأَوَّلِ كِفْلٌ مِنْهَا ـ وَرُبَّمَا قَالَ سُفْيَانُ مِنْ دَمِهَا ـ لأَنَّهُ أَوَّلُ مَنْ سَنَّ الْقَتْلَ أَوَّلاً ".