Ultimately we are all accountable for our own actions, but to say that others don't influence our behavior is nonsense.
Suppose you take a new job on the assembly line at the widget factory. Your trainer shows you how to do your assigned task incorrectly. You work diligently all day doing exactly what you were instructed to do. At the end of the day, the production supervisor tears you a new A-hole because you screwed up every part you worked on that day.
Is the trainer not at least partially culpable?
Similarly, in moral matters, while children who grow up having a strong sense of values instilled in them may go off the rails of their own volition, those that retain those values often act as they do as the result of their parentage.
Let me ask you this...if you were going on vacation for two weeks and needed somebody to watch your house, and you knew absolutely nothing about the two candidates you had to choose from apart from the fact that one was raised in a rigorous Christian household with strong values, and the other was raised by a couple felons, who do you select? With no further information would you not operate on the assumption that the parents and environment of the candidates' respective upbringing most likely had some influence on their potential behavior and demeanor?
I never said that other don’t or can’t influence behavior. I said that one is reponsible for one’s own decisions.
Especially in the case of suicide. Holding someone else reponsible for another person’s suicide is madness.