1)
What is the meaning of "Ki Kin'ah Chamas Gaver"?
1.
Rashi: Hashem, who is Gibor (stronger) than all, is jealous to pay His anger.
2.
Malbim: The anger of the woman's husband burns in him due to jealousy - he is adamant about his honor, and the profaning of the honor of his house.
2)
Why will he not have mercy?
1.
Malbim: Vengeance that comes due to Kin'ah does not 'know' mercy.
