This must be harshly punished.
But how?
We must at least try to preserve the Vienna Conventions...
Perhaps a big indemnity payment would be in order. If the money isn't necessarily there, screw it. Shouldn't have seen this occur.
Indemnities will never work. Your best bet is everyone withdraws diplomatic recognition en masse, but I won't hold my breath.
To quote a person critical of something I commented on once, "not even Western states believe in Westphalian principles anymore".
