I wouldn't say it is so much about feelings and while the US has deeper pockets than Italy, there is a system of support behind Italy while there's no collective debt in the EU. Don't misunderstand me i know why Italy has gotten a lower rating, i just find the timing peculiar that's all.
As for dollars being bought more it is know that on the forex that US currency pairs are the standard but i wouldn't say that people tend to stock up on dollars, trade in dollar pairs certainly but it is not like gold so far i am aware.
My stance about rating agencies is not something that i can easily be swayed on however as i don't view them as pristine institutes out there to give us a correct image of the situation. Regardless if the rating drop here was justified or not.