The Saudis are dependent on the US and are cooperating to some extent, but there is always a limit to what you can ask them. Can you make them eradicate financial support of jihads in the Balkans and Causasus by private persons? I wouldn't be so sure. The relationship between the Saudis and Americans is hardly alike to the one between Israelis and Palestinians, so a comparison is invalid.
Not completely, but they will try. Arafat won't even try, and he has promised to. You bet there is no comparison, that is my point.