I doubt the US will ever invade Iceland. It will have massive consequences for the US government, it might be controlled by interest groups, but they are not all powerful, the people still do have a say.

It will be much more difficult to convince a Kentucky farmer that the US should invade Iceland with it's white Christians, as supposed a strange-sounding nation with non-white non-Christians(sad, but true).

And though Iceland doesn't have a military, it does have friends who do. It is interesting entertaining the idea of a US invasion of Iceland. It would result in an immediate hostility towards the US from many nations, as it would be to attack a friend(if they attack Iceland, they can attack us), especially from the Nordic region(whose commercial powers are not to sneeze at).

Anyways, data safe-heaven, great idea.