1)
Who is Yerubeshes?
1.
Rashi: It is Gid'on, who made Merivah (a feud) with the Boshes (shame), i.e. the idolatry Ba'al.
2)
Why should the Shali'ach mention the death of Uriyah?
1.
Malbim: Yo'av is answering why they approached the wall. The Shali'ach understood that Yo'av says that Uriyah himself decided to do so. David would understand that the real purpose was in order that Uriyah die.
