Hahahahaha.
I'm sorry, but those comments (by the way OP, you deleted the link in your post but seeing as you've been quoted people can still see the article) were bloody hillarious. This obviously doesn't show all Americans but Jesus it shows some retarded ones.
"Those Krauts..." Sorry buddy, Krauts are German.
"This is what they get for starting WW2" Considering the Allies already had Canadian, Australian, Indian and other commonwealth troops fighting with them, I'd say WW2 started before you guys joined, oh I'm sorry I forgot America is the center of the universe and the rest of the world just sort of idles about untill you get involved.
Idiots will be idiots, they are a small minority and all you can really do is laugh. As fun as it is to think this is just Americans, I'm sure if Germany had some major disaster some Brits would be posting comments such as "Two World Wars and One World Cup!" and all that bollocks.
Remember the Youtube videos of the Australian floods and all the people on there taking the piss?