Also bear in mind the only Klingons we tend to ever seen are the military and the nobility.
Other than Worf who ends up in the nobility, we only see a handful of Klingons who don't fall into those categories. We see the woman in Sins Of The Father, the scientist in Suspicions, the religious Klingons from Voyager, the lawyer from Rules of Engagement, B'elana's mother, the children in Birthright, and that's pretty much it. We don't get a strong sense from them that the values of the nobility reflect in the proletariat, and the nobility tend to only give the external appearance of honor when most of them are really just devious schemers fighting to increase the influence of their own house. For all we know the common Klingon is tired of war.