Question

why did Pain killed Jirayia when he was his Sensei​

Answer 1

Answer:

so I can see it is not going to

Explanation:

he was so I can see it is not going

Answer 2

Answer:

if Jiraiya had stayed with them, Yahiko would've still been alive. Nagato saw his innocent parents being killed by Leaf ninjas as well and that, alongside the fact that Jiraiya left them, triggered a sense of hatred. ... Nagato had lost his sense of purpose. He became cold and just stopped caring about anyone.

Hope it helps :)