Not really anti-americanism. Just saying that the US should get to a slightly more relaxed approach on such matters. Germany is not indian territory (in a John Wayne sense) and german security forces are quite capable.
But as I said, both the leaders of the peaceful protests as well as the local police commanders reacted quite well, it seems. But 30000+ protesters plus 13000 police is quite a lot for such a small town as Rostock, and more protesters are coming.
Actually the peaceful side of that anti-summit campaign seems to turn into some kind of baltic Woodstock. Quite a few people I know are on their way there and maybe I would've gone myself if I didnt have to work.
In a navy context, a german navy minesweeper blew up a WW2 magnetic mine off Heiligendamm this morning. At least the navy gets the opportunity to do something worthwile on their time and clean the baltic from such leftovers