Really? If my husband cheats and I become angry, he is not responsible for my anger? He is completely blameless? C.mon now.
That's right. He's responsible for his adultery and any additional harms, but he's not responsible for your emotions.
He is completely blameless?
Nope, he's committed a serious sin. However, that doesn't give him responsibility for your emotions. Other people cannot "make you" experience an emotion. The emotional state exists, and the person experiencing it has to own it and address it, or that person is stuck.
This is not, of course, everyone's view of life, but to me, it has obvious survival benefits.