1)
In what sense will Hashem rise?
1.
Rashi: From the many evils that the enemy did to My nation. I will not hold back further.
2.
Radak: I will stand against Melech Ashur, who destroyed your land.
3.
Malbim: He will stand to save - "Eshketah v'Abitah vi'Mchoni" (18:4). He will be elevated in the mouths of people via My wonders.