Why will need guns in the city to eliminate the wicked?

[A B2]

The prophet of God will enter in the city of the evil
with sniper rifle, axe, knife, bow etc
as said in Jeremiah 50 and 51.
Why will he not do as Jesus that made an entire army fall down? (Luke)

What will happen to those trying to enter in his house in his absence?

How will he clean the blood and remove the bodies in the hall of his stair?

Will he appear in the newspaper, facebook, orkut, twitter etc? How
people will explain a guy that kill people and cant be killed?
Will they prefer to cover up it?
Nehemiah 3