Why did Communists promote Evolution?

[Angrboda]

3. Finally, from a Christian perspective, there is a special reason to be cautious and skeptical at least about Ape-Human Evolution or AHE, because those who hate Christianity use it as a polemical weapon to attack the Faith. In a 1930 Book by William A Williams where he successfully exposed the "Piltdown Man Hoax" that was commonly accepted at the time, but universally acknowledged to be a Hoax only after 1953 (see next point), the author wrote: "Other evolutionists openly announce their antagonism to the Bible and Christianity. Clarence Darrow, in the Tenn. trial, called Christianity a “fool religion." ... We were not surprised to learn that, in the Tenn. trial, evolution was defended by agnostics, who made their chief attack on the Bible and revealed religion; and the school, the home and religion were defended by men of high Christian character. Had Mr. Darrow as earnestly defended Christianity and Mr. Bryan as earnestly opposed it, millions would have held up their hands in astonishment. But the alignment was natural, and opened the eyes of multitudes to the fact that evolution is a friend to infidelity and a foe to Christianity. Their objection to prayer during the sessions of the Court shows that they hated what God loves." From: https://www.gutenberg.org/cache/epub/850...mages.html

In Rev. Williams book he notes that many "evolutionists" also reject Piltdown. So what is the significance here? Williams presents no evidence that it was a fake. Claiming he "exposed" it as a fake is a stretch. Williams screed is nothing but fallacious argument after fallacious argument. As far as I can tell he presents no valid argument that Piltdown was a hoax.

Since it's your evidence, please present us with the evidence that Williams was using to draw his conclusion?