I must make myself clear, this isn't actually treachery. It's not as if we have any sort of legal, social, or national ties. So it's not really possibly for you to commit treason or betray us. Or as the dictionary defines it, ahem:
"violation of allegiance or of faith and confidence"
"an act of perfidy or treason"
Clearly you've done neither of these, at least not by any reasonable interpretation. We clearly had no allegiance. It would have been rather silly of Mograine or me to have any faith in you or confidence. Treason we already talked about.
But really, I'm not very happy about this. I'm sure you can understand that and perhaps you can understand why I chose words which were not entirely accurate, but which served to convey my extreme displeasure at your actions.
So in short, I am going to attempt to kill you now.