What is the classification of killing by [mis]interpretation (ta’wil) in terms of whether it is intentional, semi-intentional, or accidental?

The questioner did not specify the type of interpretation that led to killing. Therefore, the interpretation that prevents قصاص (retribution) is valid in the interpretation of the people of بغي (rebellion). They are not held liable for qawad (retribution), diyah (blood money), or kaffarah (expiation) for the lives and properties of the people of justice they destroyed through a permissible interpretation, even if their act was forbidden. This is also the ruling according to the majority of jurists regarding not imposing legal punishments on them. As for the Shafi'is, they hold them liable for lives, property, and legal punishments in situations other than wartime.