Redating the Conquest

I read this today and couldn’t figure out if the guy is trying to rewrite history or if he is just ignorant.

“It is widely argued that Joshua’s account of the conquest does not match what is known from archaeology about the patterns of occupation and destruction of the cities in Canaan….Conservative explanations for these disharmonies include redating the conquest from the generally accepted thirteenth century to the fifteenth century….” (J. G. McConville, “Joshua, Book of,” Dictionary for Theological Interpretation of the Bible, 405).