It is very hard trying to convince anyone that believes by faith and not reason of their error. All the things you mentioned are side issues. If you must argue then find the one core assumption that facilitates their belief. That is the only way to discuss the difference and really understand where each other is coming from. In Christianity it is the subject of faith. Faith in God and the Bible. Biblicists believe the Bible to be the word of God and in that sense it is their God. Understand what faith means Biblically and you find the key assumption that that all of Chrianity hangs on,
The Bible says, "Faith is the substance of things hope for, the evidence of things not seen." You must understand that faith excludes logical reason or proof. When Christians claim they have proof that God exists or the Bible is the actual word of God without error in its original state, and God is immutable, all knowing, eternal, etc., it is all based on faith. To try to prove it nullifies faith. FAITH IS THE KEY ISSUE, AND PROOF OF GOD, OR THE BIBLE AS THE WORD OF GOD, IS ANTI FAITH. That is the point of departure from reason. Understand that, and keep the discussion on that issue, because all else is based on that one assumption.
Christ said, blessed is he who believes without seeing. A person of real faith cannot be swayed by reason or proof, because faith is anti reason and logic. For them faith is logical, and when someone believes that truly, you can never sway them no matter how smart or logical you are.

Reading selected verses ad infinitum still leaves the rest unread... Complete works of Josephus would possibly help him. Also, an understanding of the Customs and Mores of the Jews about 100± AD/BC would help him... And you... Mary was referred to as a maiden (not a Virgin, exactly) in their Customs and Mores sex between a Maiden and her intended was in fact sort of encouraged... Jesus's ascent into Heaven(The High Priesthood) 14 steps to the Holy of Holies, actually a dining hall for the high priests(LMAO)... Sacrifice the best youngest Bull and BURN Their ENTRAILS on the alter... The High Priests Eat the rest...LMAO!! "Squab" BTW- What do they think happened to the Animals they Sacrificed? The Myths of that era can be explained by real Customs and Mores but the results are not of god they are of man... And As Lewis Black says his people were very adept at Bull Shit...