This post actually reminded me of and got me searching for a 4chan post where some Croat or Bosniak (OK, the Balkan ethnic hate shit isn't exactly the white-on-white hate people are surpsised to discover, but still) was listing off the worst war crimes he knew of that Serbs did in the wars. I remember: a 14-year-old boy being forced to rape his mother and then being executed in front of her, either a single guy or a group of soldiers shooting into a bunch of elderly POWs, killing them until the remaining ones started begging for their lives just for fun, and an elderly married couple in their 70s being executed in front of each other, with one of them being boiled alive.
That probably isn't even half of that, there must've been about eight such incidents he listed off, but those are the only ones I remember at the moment. I searched for it for a couple of hours, couldn't find it, but I did find this personal story of an anon from when the shit was starting to go down

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Also, another Anon talking about the most disgusting shit they've seen so far from the Ukrainian war:
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