The chieftains of the tribes that had settled to the West of the Jordan River were upset at the Reubenites, Gadites and half tribe of Manasseh on account of an altar these tribes had built on the edge of the river.
Even though they received their loyal help through the entire time Israel was fighting the Canaanites, these Western tribes were ready to go to war against their brothers as soon as they heard of about the altar.
It was never the Eastern tribes’ intention to separate in worship, however, as they patiently explained.
“If we were rebellious and unfaithful to Jehovah, do not spare us this day. […] No, it was because of another concern that we did this, for we said, ‘In the future, your sons will say to our sons: “What do you have to do with Jehovah the God of Israel?”‘” (Jos. 22:22-25).
The tribes of Western Israel heard out this reasoning and then proceeded ‘to praise God, and they said nothing more about going to war,’ (Jos. 22:33).
Thus we learn that it is always better to assume the best in others.
Even when we are thrown off by certain actions they decide to take, we cannot see what reasoning or underlying motivation they have.