I see what you are saying about how Jesus is the true representation of God. However, Jesus affirmed the old testament tradition and he didn’t feel the need to explain away Israel’s violent past. He quotes and refers to the very OT books that explain the Canaanite genocide. To me Jesus affirms the OT narrative and the main character in that narrative, that is the one he calls Father.

Maybe the Israel’s violent past reflects a nation wrestling with being a ‘called’ nation for the sake of other nations in a time of territorial war and violence. They have this beautiful call but need land and believe God has promised them Canaan. Being less powerful than the Canaanites they find their occupation of their territory a miracle.

So maybe their conception of God was a little wack, and they did things in God’s name that probably wasn’t God’s desire. But God appeared to let all this happen and not intervene except maybe to save them so that his people could continue in their calling.

Its also interesting to read some of the archaelogical research done on the OT and the evidence for the defeat of the Canaanites. Whatever, happenned in history, the narrative made sense of these events.

I just dont think one can write off the OT narrative that easily. Jesus didnt.