That's a stretch. As righteous as their quest may be, they're still fighting for and representing themselves. Even in Biblical times, the Israelite army was never called the Army of God.
In Biblical times,the Hebrews were by process of elimination certainly the army of God,as they were the only people who worshipped the one true God,and they were His Chosen. He Himself directed their mode of warfare,when he told them to kill every living thing,but leave the trees.
I Samual 17:26 And David spake to the men that stood by him, saying, What shall be done to the man that killeth this Philistine, and taketh away the reproach from Israel? for who is this uncircumcised Philistine, that he should defy the armies of the living God?
I guess it's back to hitting the books Young Scholar.
You have the right to your opinion, as do I. My faith is deeper than your argument.
LLS