Oddly, https://en.wikipedia.org/wiki/Bosnian_genocide is not listed?

I'm not a genocide scholar, so may be way off the mark here, but imagine a language that only has a few 100 native speakers left. There's one person who really hates them, writes in his diary about how he longs for that culture to cease, and then he murders the only remaining historian or language teacher of that group. Is that attempted genocide? A little bit?

My point isn't "yeah it is" because I don't know, but I'm very certain that I'm still closer to whatever the heart of it is, than sheer "kill volume". We already have a word for massacres and mass murder, and genocide usually comes hand in hand with those and many other crimes, but it's not those crimes.