Mafia 87. At the Dawn of War

I don't understand something... If Sesam is Jacob, then why wasn't she around? And if so, does that mean Mold was the Guardian? I don't know how else to explain the absence of a murder by the Guild.
Why me, specifically? Are you sure you know that I'm a Negative, or is this just a 3/4 chance of executing a Negative? No, thank you, I want to live too.

Added after 22 minutes

Now the Guild can rest easy. What others might consider a failure is actually a gambit. However, I am still forced to remain here...

But how should I understand this? I'm completely confused :(