For those who don't know, Germany is a nation of laws. Aircraft fly in formation under the rules of the air plus the appropriate sortie briefings. For a collision to occur, in the absence of other failures, somebody breached the rules, however inadvertently. The Germans are identifying which pilot was at fault under the regulatory framework in place. It's the same as a road traffic accident in Germany - somebody will always be held at fault under the rules of the road. The fact that 2 tragic deaths occurred doesn't change the way the authorities will review the accident. It's not personal, it's a legal requirement.