But even before, yeah they’d have a right to be worried, considering Isreal after coming to there after the exodus often killed every man, woman, and child in the places they conquered by divine order.
The archaeological (and biblical) record indicates that rather than a sudden shift from Canaanite culture to Israelite culture, the change took place over centuries, with Canannite culture persisting for some times. The biblical prophets constantly complained about the Israelites pursuing Canaanite and other religious practices. It seems that the Israelites were not very good at genocide.





