You're right, Joe, that prejudices were inbuilt in cultures even many centuries ago. For instance a significant and influential faction of first-century Christians who were hostile to their message being spread beyond the boundaries of Judaism. (According to some historians they came within a whisker of having their way.) However the readiness of religions to bend themselves to accommodate prevailing cultural norms is, in my view, a readiness to "blow with the wind" - tangible evidence that mankind makes gods and not vice versa.

Also I don't see any merit in the 100-years test. Christianity has been around for nearly 2,000 years and has been a root cause in some of the most appalling crimes the world has seen. You will say such crimes are the work of "bad apples" but in fact some have been institutional and plainly would not have happened had the church not existed.