Do not lie and say that quran was not preserved and try hard to challenge in the original version of quran in Samarkand and to try to prove the inaccuracy of Muslims in collecting the Holy quran for several reasons :
The first reason : is that you believe in a book that have no original copies and it’s original copies are missing
The second reason : is that you believe in your book although you know that the original manuscripts are missing and you don’t know the accuracy of translation and you have no prove that the translation is correct and that doesn’t cause any problem for you
The third reason : is that you believe that your book is sacred despite the fact that there are many parts that you don’t know who wrote it
The forth reason : is that you don’t know who are the writers of the bible and you don’t know anything about them and their life and you trust them without any support
27 And he took a cup of wine and gave thanks to God for it. He gave it to them and said, “Each of you drink from it, 28 for this is my blood, which confirms the covenant between God and his people. It is poured out as a sacrifice to forgive the sins of many. 29 Mark my words—I will not drink wine again until the day I drink it new with you in my Father’s Kingdom.”
Do not object if quran say that God distorted the jews who disobeyed God into Monkeys and pigs because according to your bible jesus said the same about them
6"Do not give dogs what is sacred; do not throw your pearls to pigs. If you do, they may trample them under their feet, and then turn and tear you to pieces.
40 – witness of two women equal to witness of one man
Do not object if God in quran said that the witness of two women is like the witness of one man
God says in the holy quran
Let his guardian dictate faithfully, and get two witnesses, out of your own men, and if there are not two men, then a man and two women, such as ye choose, for witnesses, so that if one of them errs, the other can remind her.(2 : 282 )
Because according to your bible the women is even not allowed to witness and the witness is only for mens and womens are not even mentioned