Has any non biblical evidence been found for the Canaanite Genocide?

It is not believed by most scholars that there was a Canaanite Genocide. The evidence indicates a fairly peaceful migration into the land. For example, the cities of Jericho and Ai are described in the book of Joshua as receiving particularly harsh treatment of wholesale slaughter. But the evidence shows that neither one of those cities were even inhabited at the time that Joshua says they were conquered. So it seems to be a made-up story. I'm not sure what purpose the story is supposed to serve. I think it is meant to show that Israel has a right to the land, but this way of erting right to the land is very questionable to me. You have a right to the land because you went in and slaughtered the natives mercilessly, men, women, and even infants, and animals?! That gives you the right? Even if it didn't happen, to CLAIM that it did is morally problematic, because it is showing that the authors believed that such strategies were acceptable means of acquiring their land. And it clearly shows that they were not opposed to the idea that their God would actually command such atrocities. The fact that the story is there tells you something about the authors, and I personally am rather disgusted by those authors, based on their writing of such stories.