I don’t get how people here don’t seem to understand that you’re not just going to be immediately cool with the spouse of someone who murdered yours. Whether or not they are actually to blame, it’s entirely human and nature to lash out at them. He didn’t get physically violent or even that hurtful with his comments to be honest compared to what he lost.
It would be incredibly idelaistic to expect someone to rationally just accept that she knew nothing and that she was also a victim, he is grieving and found an easy target to blame. It’s like parents of shooters or spouses of killers in real life, they may have been just as hoodwinked as everyone else but you would not expect victims of their child/spouse to immediately offer a shoulder to cry on while they are also still grieving.
It would have been smarter to make a new sub for the show like they did with Attack on Titan.