Well I mean, it was war and it was 70 years ago and they were on the other side and the Japanese committed all sorts of atrocities. Not saying empathy for the common soldier/sailor isn't possible, but it's not surprising to see some indifference.
And for all intents and purposes, the Yamato was target practice in its final battle. It never stood a chance.
So did everyone. Everyone comitted all sorts of atrocities. It was total war.
Those men who died on that ship did not make the decision to commit those atrocities and they were most like every other soldier in the war innocent men ripped out of their lives and thrown into battle.
RIP to all the sailors that died the day the Yamato sank both on the Allied and Axis side.