Mr Troi wrote:
You are in very dangerous territory if one day you happened to find yourself contemplating genocide because you thought you had a good excuse for it. Inevitably something unplanned happens. A deadlier threat emerges, or everybody gets killed anyway but in different circumstances, or you become so corrupt that people try to kill you.
You don't seem to understand one thing, Mr Troi:
PICARD DID COMMIT GENOCIDE!
Picard had a chance to stop the borg and he didn't use it, knowing
that the borg are and will continue to kill BILLIONS, in an orgy of violence, death and suffering beyond comprehension...
Picard either used the weapon against the borg, destroying the hive mind, or he didn't, in which case he, too, is responsible for the death of BILLIONS UPON BILLIONS at the hands of the borg.
One can only choose the 'lesser evil' in this situation; there's no moral, 'white' choice.
Picard allowed the borg to endure, staining his hands with the blood of BILLIONS.
And why did Picard did this?
He did it in order to delude himself that, even in this situation, he made the perfectly moral, 'white' choice. As for the BILLIONS the borg continued to kill, well, if Picard didn't have to see their faces as they died, he can keep telling himseld they're not his problem, that their blood is not staining his hands, too.