The MPs are all wriggling trying to shift blame.Sovereignty does not enter the equation. The ambassador's goose was cooked. He is expected to be accurate in his assessments but the language used needs to be tempered. His was not. Once it hit the public domain his position was untenable. That is what caused his termination regardless of whether he jumped or was pushed.
Diplomacy is about being diplomatic, the ambassador was not. Had he described you in such terms would you want anything to do with him?
Sovereignty has absolutely nothing to do with the situation.