How would one go about that peacefully?
It wouldn't be easy in practice. Such distinctions are nonetheless extremely useful, because they let you tease out why you think something is wrong. And having that kind of understanding is important, because of real rhetorical tricks used all the time by real people in the real world.
It works like this: you find some word/concept that people equate with something they consider horrible. So you notice that people use "genocide" interchangeably with mass murder, mainly because the most mentally accessible examples of genocide are mass murder. Pretty soon everybody is happy to say genocide is horrible, because mass murder is horrible.
Then you quietly shift to using a different meaning of the word "genocide", one that might apply to some non-mass-murder activity you don't like. And you expect and desire the horrible associations to come along. You're trying to associate this other activity with mass murder.
At that point, it doesn't matter whether the other activity is likely to succeed at causing genocide or whatever. You can still claim that it's a tactic of genocide, or that it goes in the direction of genocide. You can rely on at least some people to mentally treat it like the "canonical" tactic of genocide, i.e. mass murder. It's very hard to avoid falling into that kind of connotational trap, because of the way human brains work.
For extra credit, you create the negative connotation, and then exploit it. You'll find people doing that all the time in political debates, switching back and forth between different meanings of the same word, at one point pumping up the negative associations, and at another point attaching them to something different.
All that matters, because rhetoric influences how people treat others and their behavior, up to and including outlawing things and reacting violently.
And this happens all the time with the word "genocide", specifically.
I remember a case where some rich person was funding voluntary sterilizations for poor people in the US. She wasn't forcing anybody. You had to come to her and ask for the money. I don't remember whether she provided any services for actually arranging the sterilizations. Her program disproportionately affected black people. She was therefore accused of genocide, or attempted genocide... and every attempt was made to trade on the association between that and mass murder.
That's not an isolated case. Do a Google search for "soft genocide", and you'll find a bunch of white supremacist loons claiming there's a conspiracy to wipe out whites. They're not so loony that they're actually accusing anybody of mass murder, but they are trading on the association of the word "genocide" with mass murder.
The tactic gets used by people with a certain amount of influence, too. http://news.nationalpost.com/f...
All of which means that, regardless of whether peaceful genocide is actually possible, it's important to keep it conceptually separated from the murderous variety.