For the record, Nazi Germany was mostly peaceful, as was the Soviet Union. Even when our Civil War was raging, and 600,000 of us died, most of the country was peaceful. Even those who were in service and/or near the fronts had long periods where there were no cannons firing at the moment. Lots of nervous waiting. Combat deployment itself can be mostly peaceful – though admittedly in the sense of “no active shooting” rather than any sense of restfulness. Much of medieval warfare was sieges, or moving from one place to another, or setting up camp. Mostly peaceful. Yet the small amounts of “not peaceful” mattered greatly then, and matter greatly now.
The excuse of “mostly peaceful protests” is rather empty. If decent people should have refused to show up at Charlottesville because they knew there was a fair chance someone would turn violent, and to attend would give them cover and legitimacy, then how do we justify showing up in Seattle? Maybe we can. But then we have to extend that in both directions. We feel very, very different about protests we agree with, don’t we? It just feels different, and we just know it’s right.