YES! "Murder by proxy". Manson was so scary to me as kid because he didn't kill, rather, was able to manipulate others into doing it.
That's great info on Bugliosi! I haven't read the book but I'll definitely have to check it out. The Helter Skelter scenario and what really happened in the Manson Family is so much more terrifying and repulsive than "he's a serial killer".
I like your "yet", re: Bush, btw :D