Ok, so I'm in a restaurant. and someone's shot and killed. The police would want me to stay put until they can identify me. If a gun's found, they ask me for fingerprints to rule me out. You'll no doubt be aware that fingerprints can also be lifted from a piece of paper....
Second, the restaurant isn't going to float away and land in a different country (anotehr jurisdiction) with most of the suspects still inside, enjoying filet steak (F), medallions of pork (J) or some variation on chicken with rice and a pale sauce (Y).
Lastly, any restaurant I'd go to is not likely to explode at 35,000 wiping out everyone enjoying/suffering the food, and those in small villages below. Remember Lockerbie? there's a hell of a difference between killing one person and committing crimes against humanity, wiping out hunders/thousands of people.
I understand your indignation, but isn't it a little misplaced? I can ceratinly understand not wanting to have your fingerprints taken - I wouldn't want it either. However, in the EU and especially Ireland, there are very strict laws governing privacy - fingerprints and other biometrics are held sacrosanct.
The German suspect is under arrest, and everyone else's fingerprints are now locked away under the protection of a totally independent court system and will be destroyed when someone is found guilty.