Another problem with that article is that it takes what's written in the Bible about the Canaanites as the literal truth. It would be as if people today were to take the stereotypes portrayed of Japanese during WWII (or Germans during WWI and WWII) as totally accurate.
What it actually is, is history/propaganda written by the winners. Extremely common through history, with no real concern for getting the facts straight. Using Hebrew propaganda about Canaanites to justify their mass slaughter by said Hebrews is disgusting, to say the least.