For those familiar with mythology you'd notice that Leaders usually lose their lives to their offspring (most notable the Caesar Family) Danzo was right to say that ideologies of the 3rd was weak; my point being

Sensei/Hokage/Almost Kage Student/World Criminal
Hiruzen Saratobi Orochimaru (Killed Master)
Jiraiya Nagato (Killed Master)
Minato Tobi (Killed; well kinda)
Kakashi Sasuke (failed to kill)

Anyone see a pattern here seems the Senju way is to teach world class criminals i agree you can't be responsible for peoples actions but someone has to be if it's every generation its happening. Can't wait to see who Naruto will train following the wrong path. Oh if anyone can clear up why Nagato killed Jiraiya i was hoping the latest flasback would explain but oh well. . .even though Jiraiya was a former acquaintance shinobi usually capture an interrogate spies so i was really confused as to why he killed him.