War is often more complicated than "innocent people being murdered" and we both know it. The Israeli-Palestinian conflict isn't morally black and white, and the current Israeli-Hezbollah conflict is something else entirely.
I think you may be proving my point. Taking one side of a complicated situation because of a black-and-white moralistic thinking is potentially destructive, and organizations like Hamas benefit from that.
As for your slavery example, did slavery disappear because humanity awakened morally and started demonstrating in the streets, or because we gained a new non-human resource of raw power? Previous civilizations didn't engage in slavery because they were profoundly immoral, but because human and animal muscle was the only practical source of power. The specifics varied across the globe, but unfree labor was ubiquitous in pre-modern societies.
For a contemporary situation, imagine a 22nd century activist judging people of 2024 for eating meat from dead animals, when he can get a good steak by pressing a button on a steak-making machine. It wouldn't be demonstrations which made the difference between 2024 and 2124.
