I wonder why that might be.
Then there are the various claims about English Common Law, the foundation of the legal system in much of the English-speaking world, being part of the Christian heritage - Thomas Jefferson didn't think that was the case
Christianity neither is, nor ever was, a part of the common law. . . .
For we know that the common law is that system of law which was introduced by the Saxons on their settlement of England, and altered from time to time by proper legislative authority from that time to the date of the Magna Charta, which terminates the period of the common law ... This settlement took place about the middle of the fifth century. But Christianity was not introduced till the seventh century; the conversion of the first Christian king of the Heptarchy having taken place about the year 598, and that of the last about 686. Here then, was a space of two hundred years, during which the common law was in existence, and Christianity no part of it ... That system of religion could not be a part of the common law, because they were not yet Christians.
-- Thomas Jefferson, letter to Dr. Thomas Cooper, February 10, 1814