Well it clearly should have killed even more cuz most survivors immediately became freikorps and then nazis.
"Ooh the youth of yurop was extinguished in the mud in a senseless infight"
Sadly not all of it, and I don't want to even think what would have looked like had they pointed their armies only outward, 100 vietnams but 50 years early
ottoman massacres of non-turks were fueled by ethnonationalists who only got more humiliated and empowered as the ottoman position collapsed due to war(s). so it was based on revanchist nationalism boiling for a few decades but escalated due to ww1
the post-war division of ottoman territories had the british & french & multiple minorities scrambling to carve pieces off what'd become modern turkish borders---when the french & greeks lost this is when the most severe phase of ethnic cleansing began & armenians were practically erased from greater armenia & cilicia, and greeks were kicked out of western turkey.