回复：我不会帮他解释。难道让孩子觉得自己笨蛋失业找不到工作就该骂孩子？

well, she chose to marry him in the first place, right? since it's not so easy to go through divorce (children always hope their parents could be with them no matter what), unless it's the last resort.
It's for the child's sake to see why the dad did what he did. When he sees the real reason, he won't blame himself. (The problem is not his, but the other persons--externally rooted.)
Actually the child can talk back to dad: I got  the idiocy from you. After all it's the genes that get passed on, isn't it?