The Jews were allowed to attack
ONLY an armed force that might attack them. (attack the Jews)
Esther 8:11 .
..the king allowed the Jews who were in every city to gather and defend their lives, o destroy, to slay, and to annihilate any armed force of any people or province that might attack them,
The Jews were allowed "
to gather and defend their lives" and to slay "
any armed force...
that might attack them".
They were not allowed to go searching for enemies to kill.
The JEWs were being attacked.
They gathered together so as not for each family to have to face an armed mob.
When the people showed up to kill Jews, they got their butts kicked.
It was clearly self defense on the part of the Jews.