WTF??? This is patently absurd.
Klingons have a rich warrior culture that values honor above all else. They made that abundantly clear in countless episodes.
Humans (in this universe we inhabit) do not have a warrior culture, and definitely do not value honor. If we did, we would not be about to elect Trump or Hillary (or almost anyone else that was running).
The Klingons most resemble various old traditional cultures, such as the Japanese Samurai culture, which of course is long dead.
The ST race that was meant to most resemble modern humans is the Ferengi: profit above all. However, even the Ferengi had some real values; they thought it was important to properly assist underdeveloped cultures to develop economically and technologically, so that they could become good trading partners. Bombing them into submission was not part of their ethic.
No, I think the Terran Empire depicted in several ST episodes (not just "Mirror, Mirror", but also an excellent ENT 2-parter called "In a Mirror, Darkly") is a very accurate depiction of modern human culture transposed into a future with warp drive.
But I do agree with your final assessment about good humans being the tiny tiny minority.