I believe a key question is whether the Swiss bore any responsibility during this incident. The Russian acted out of anger/grief for the loss of his family. That, in my opinion, is no excuse to off an ATC who has made a mistake, however critical.
The question is, I believe, whether the Swiss have acknowleded their terrible mistake whereby the two aircraft collided and what is going on in the courts to sue the hell out of anyone that was connected from dustbin sweeper on up. I'm sure the buzzards have been working on it from day one.