question #3 Sahih al-Bukhari 7321, Book 96, Hadith 51 : What are the implications of establishing a harmful tradition according to Islamic teachings?

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”