@exogriz It's not ironic at all. It's human nature, and every nation that exists or has existed has a bloody, brutal past. Whatever country you're from, think twice before you start pointing out another country's merciless history. Since we're talking about Japan, and just to use South Korea as an example, because they love to hate Japan for WWII atrocities: Look up what South Korean soldiers did during the Vietnam War.
We modern humans are far, far worse than our ancestors. We kill for greed; they killed to survive.