it isn't his fault. No one is at fault. he is showing manifestations of borderline symptoms. He should be under supervision (even after he was hospitalized if they ever did). And even if the supervision failed or therapy (if they ever did) fall through, they all did their best.
Blaming someone for this is just emotional manipulation especially for someone as unstable as Sahan. I know it is easy to blame but please no.

nah, they shouldn't blame him.