He saved himself, that is justified. War is ugly, and it makes people do things they regret. It is all opinionated. He has suffered loss, and he wanted to survive, there’s nothing wrong with wanting to survive. Of course it makes him sad that he has to leave his family, but if he has an opportunity, he should take it. Sometimes in life, we must go against the wishes of our family, or the good of the family. Max decides that it is worth it to go to Hans Sr. home. Staying with them, in some ways, would’ve been a dis-service to his family. He would’ve been another mouth to feed, another potential noise, or even another body to have to find a way to dispose of. His family, obviously, wanted him to go, because they wanted him to survive. I’m not saying it was wrong or right to go without his family, that’s not for me to say. Max knows what might become of his family, and decides he shouldn’t have to be another jew stuck in a camp, he might as well survive and continue to carry on the families name.