The Babylon Connection? by Ralph Woodrow
THE BABYLON CONNECTION? shows that claims about Babylonian origins often lack connection, takes a closer look at the oft-quoted
THE TWO BABYLONS by Alexander Hislop, and provides some much needed clarification on this subject. In a scholarly and understandable style, this book explains why Woodrow removed his very popular book BABYLON MYSTERY RELIGION from publication.
According to the teaching made popular by Alexander Hislop, if we went back to the days of ancient Babylon, we would find people attending mass, partaking of a little round wafer, worshipping a cross, going to confession, being baptized with water for the remission of sins, burning wax candles, and bowing before a divine Mother and Child. We would notice that places of worship featured a tower. Priests, wearing a circular tonsure, dressed in black garments, would give those who died the last rites. With monks and nuns in abundance, the Babylonians would be practicing essentially all the rites that are known today in the Roman Catholic Church!
ralphwoodrow.org/books/pages/babylon-connection.html
Hellenistic Commentary to the New Testament (Hardcover)
by M. eugene Boring (Editor), Klaus Berger (Editor), Carsten Colpe (Editor)
findarticles.com/p/articles/mi_qa3817/is_199803/ai_n8794636
This commentary posts “pagan” sources next to most passages of the NT, showing that there is in fact, a historical cultural connections between the NT authors and their times.
A Commentary on the NT From the Talmud and Hebraica
by John Lightfoot
philologos.org/__eb-jl/
Basically, the fallacy your friend is making is that if two systems have similiar elements one system must have copied from the other. He must prove that one copied from the other which frankly he can not prove.
Copycat Thesis
tektonics.org/copycat/copycathub.html