1)
Why does it say "va'Yishme'u"?
1.
Malbim: They heeded the rumors that it was built for evil, and did not judge them favorably.
2)
What is the meaning of "la'Tzava"?
1.
Radak: It is like bi'Tzava. We find like this - "va'Yeshvu Ito la'Aretz", "Lifneichem le'Charev", "Haragti l'Fitz'i" (Iyov 2:13, Vayikra 26:7, Bereishis 4:23).
2.
Malbim: They gathered for the sake of making an army, if they will need to fight.
3)
Why did Bnei Yisrael prepare for war?
1.
Rashi: Bamos were forbidden once the Mishkan was fixed in Shilo.
