Those kids are idiots who don’t understand how the world works. At best. At worst they’re know what they’re doing and lying for money.
The choice wasn’t genocide or rainbows. The choice was allowing the other country to do genocide or actively participating in the worst version of it. That was painfully, totally obvious to everyone with half a brain. Those people in question helped promoting the second choice that is worse for everyone but couple of rich dudes. They are absolutely to blame for what they did. They weren’t the only party to blame, but they absolutely were part of it.