You know how he was angry that his brother was ‚normal‘ and he wasn’t and so he not only pulled his brother into it but he also (probably) made his brothers cannibalistic instincts awaken? And now his brother is also incapable of living a normal life? And gave up on the idea of having a family in the future so as to not further spread this weird hereditary bloodlust? And now the bloodline will most likely end with them? That’s the double suicide.
Tatsumi is one big pussy