It would be more for show if nothing else. Of course universal jurisdiction is not accepted by our courts. I don't even know how Germany has the gall to act as if they can carry out their judgments in this capacity anyways.
I love this Times headline: http://www.time.com/time/nation/article/0,8599,1560224,00.html Why Rumsfeld Can Rest Easy Over German Charges Hilarious. I guess a lot of people just scan headlines when they buy the newspaper. Rumsfeld really dodged a bullet here. I'm glad he can rest easy now. I mean look at what would happen (bottom of 1st paragraph): "In theory the prosecutor could find him guilty of torture and put him in custody if he visited," says Zimmermann. "But in reality nothing is going to happen."
I actually wish they would indict and try him. Find him guilty too. Maybe prosecute Bush for contributing to global warming as well. Demonstrate to people why we should not join any of these mulitnational power grabs and get some momentum to withdraw from the ones we have foolishly acceded to, like the WTO.
The only problem with that is that partisanship and ignorance trump logic. People who hate Bush, would accept the idea with vengence without looking at the long term consequences of their actions. Most of them want these things anyways. Another major segment of the population is ignorant to the ramifications of it. They would see Rumsfeld indicted and figure he must be wrong without thinking it through any further.