Quote Originally Posted by poopdeville
Shukaku was totally a destruction/murder crazed beast.
No, he wasn't. Not in the sense that Naruto is while in Kyuubi mode.

Shuukaku was evil and loved chaos, but he was aware of what he was doing and could think and speak; he had a consciousness. When Naruto goes Kyuubi, he doesn't speak or think, he just growls and roars and goes off in a blind fit of rage and attacks anything and anyone; he has no consciousness and doesn't remember anything afterwards..