Mild compared to Ottoman practice of fratricide:
https://en.wikipedia.org/wiki/Fratricide#Ottoman_Empire
[The practice of fratricide was legalized by Mehmed II. Mehmed II grandfather Mehmed I had to fight a long civil war against his brothers Suleyman, Isa, and Musa. The civil war lasted eight years and weakened the empire due the deaths of soldiers and lack of unity that followed. As a result, Mehmed II formally legalized the practice of fratricide in order to preserve the state and not further place strain on the unity as previous civil wars did. Mehmed II states, “”Any of my sons ascend the throne, it acceptable for him to kill his brothers for the common benefit of the people (nizam-i alem). The majority of the ulama (Muslim scholars) have approved this; let action be taken accordingly.” When Mehmed II passed away his son Selim immediately assumed the throne and proceeded to commit fratricide on his two brothers Ahmed and Korkut. The largest practice of fratricide was committed by Mehmed III when he had nineteen of his brothers and half-brothers murdered and buried alongside their father. His successor Ahmed I when faced with public disapproval for the practice of fratricide decided to outlaw the practice and replace it with seniority ascension system along with imprisonment of any prince who would be a possible threat to the throne in the Kafes. ]