First, she is running for President. She needs specific instances where she can show that she disagreed with W's policy. She can't stand to pass up an opportunity to be on the record opposing what may turn out to be W's biggest mistake.
Second, this was win-win for her. She got to see Arafat gain credibility, and she got to see George W. Bush lose support from even his biggest fans (myself included.)
And she didn't write the thing -- she just came along for the ride. It says nothing about what she believes.
I believe you are correct.
Dittoes on your comment. I could not have said it better myself.