So confused

[jade-wynds.livejournal.com]

So I have a couple questions about 485. I didn't follow some of the logic and I was hoping you guys could explain it to me

1. Sasuke
How does killing everyone in Konoha cleanse his clan? Because 90% of Konoha's population right now probably weren't responsible. And how does cleansing the clan = revival? Basically, what is his reason/logic/motivation?

Sasuke keeps on using that word. I do not think it means what he thinks it means.

2. Kakashi
Ok, I can maybe buy that Sasuke is indirectly a victim of the anti-Uchiha era. Even though it didn't really seem to be a problem until he found out the truth. But why does that make Sasuke Kakashi's responsibility? Why does a lack of experience with the past preclude Naruto and Sakura from fighting? What drove him to this conclusion?

Edited to clarify: How does Kakashi's memory/experience with the anti-Uchiha era make him especially responsible for Sasuke? I understand the responsibility he feels as their sensei and what not, but this just seemed out of the blue.

On a completely unrelated note, did anyone else squee when Kakashi was being all sensei-ish and trying to protect their innocence, even now?  THEY'RE SO DYSFUNCTIONALLY CUTE.