"If Bruce were to live it wouldn't be just Gotham facing his wrath, not just the town or around the Globe... It's beyond. Millions could be endangered by you letting him continue his.." You let him speak but hated the man completely for what he did to Gotham." He will become something not even a thousand men like me could stop..."

"He doesn't want me as a successor he wants me as a monster!"

As Ra's died you saw it so briefly.  Bruce standing above the ruins of a world it's only survivor.  You could always see this vision, see his actions...