In 2005 the BND (apparently intentionally) leaked a memo on Thaçi exposing his connections to organized crime. German newspapers are now speculating that Thaçi is holding a grudge against the BND which lead to the arrest of the German agents. The German agents were indeed only documenting the damages done to the EU office.
Most probably true.
But Albanian clash with Germans will ultimatley lead to fall of Albanians...