I'll forever mourn 2001 as the last dying gasps of the post Cold War euphoria of the 90's.
Osama deserved the bullet to the head he got.
He waged war on a hostile empire and targeted matured economic and military headquarters. Yeah he deserves to rot and he's not the only one
According to the testimonies of his children Osama was just totally insane freak even if he was pretty good at organizing things.
But I highly doubt his significant role in 9/11. especially when even public CIA documents point to Arabs as a main source.