Your feelings are valid and you are entitled to your opinion. You said that you don't understand him so I'm going to share my understanding of Kousuke's character. I don't want to argue either, just extend what I understand onto you.
if you are not ukrainian currently searching for nearest shelter, how can you joke about ww3 as “coping mechanism”? what are you coping with? i woke up to the sounds of explosions in my city today, is it funny to you?