Why does it say "Elokeinu"?
Radak: He will take our vengeance from the nations.
Malbim: He Himself will come.
About what will Hashem not be silent?
Rashi: It is about the blood of His servants that was spilled.
Radak: It is about our pain and affliction.
What will fire consume in front of Him?
Radak: The nations.
What is "Sevivav"?
Radak: It is in Yerushalayim, the place of His Mikdash and dwelling; it is not the same as Lefanav.
Malbim: Refer to 50:3:5:2
What is the meaning of "Nis'arah"?
Radak: The residents of the land will perish via a Se'arah (storm).
Malbim: A storm around the fire will make it flare up.