What would lead you to believe that she got booed because of her countries policies?
Since you did make that assumption.

Mick has a point. It could have been for other reasons.

I was thinking it was because of our war in not "with" Iraq. I am sure some of them were booing for that reason even if all of them weren't. The ones that hate the USA looked around, saw what was going on, and realized this was their big chance.