1)
What is the meaning of "v'Hisgo'ashu"?
1.
Rashi: They will become crazy.
2.
Radak: This is [shaking,] like "va'Tig'ash va'Tir'ash ha'Aretz" (Tehilim 18:8). The verse did not mention the subject.
3.
Malbim: A nation will fight another nation, and a man will fight his friend.
2)
What is the meaning of "v'His'holelu"?
1.
Rashi: It is an expression of madness.