‘ Naphtali did not drive out the inhabitants of Bethshemesh, nor the inhabitants of Bethanath, but he dwelt among the Canaanites, the inhabitants of the land, nevertheless the inhabitants of Bethshemesh, and of Bethanath became tributary to them.'
Like Asher, Naphtali lived among the Canaanites, but eventually became strong and subjected them to tribute. Their concern was wealth, not obedience to Yahweh. They did not obey Yahweh and drive them out. Once again fraternisation led to degradation.
So the sad tale of all the tribes is of disobedience to the covenant. Having obtained their foothold they spread and gradually gained control, but ignored the commands of Yahweh and allowed Canaanite influence to degrade them. It is one long story of disobedience. It is one thing to start off determined to be obedient, it is more difficult to maintain it as time goes by. Indolence, greed, and worldliness all combined to seek to prevent it. The way of living of the sophisticated Canaanites must have been a great temptation to these newcomers from the wilderness, and their easy moral ways (Baalism had no ethical teaching that we know of) would appear to many to be preferable to the stern demands of Yahweh.
The lesson for Christians in all this is the danger of compromise. If we do not rid ourselves of temptations when we can, the time will come when they take us over.