Doctrine of biblical inerrancy and Pope Benedict XVI questioning the historicity of passage in the Gospel of Matthew?

"In his 2011 book, Pope Benedict XVI, besides repudiating placing blame on the Jewish people, questioned the historicity of the passage found only in the Gospel of Matthew which has the crowd saying, "Let his blood be upon us and upon our children" (Wikipedia ). How does this questioning fit in with the Catholic doctrine of biblical inerrancy? * To make a clarification: I do not believe in collective Jewish guilt for the crucifixion of Jesus then, or at any point of time. I do not believe in collective guilt at all for that matter.