Salaam to you IAmZamzam,
Thanks for your question, no I was not talking to you as I was writing to Jim, however, I did write a reply but my computer hanged just as I was about to post it. Here I have rewritten it, but not as I originally did.
Some quotes I found on the net pertaining interest.
Exodus 22:25 “If you lend money to any of my people with you who is poor, you shall not be like
a moneylender to him, and you shall not exact interest from him."
25 King James Bible " If you lend money to any of My people who are poor among you, you shall not be like a moneylender to him; you shall not charge him interest.
Deuteronomy 23:19 "You shall not charge interest on loans to your brother, interest on money, interest on food, interest on anything that is lent for interest."
In the book of Luke Jesus makes it clear that we're not even to turn our enemies away in their need:
"Give to everyone who asks you, and if anyone takes what belongs to you, do not demand it back. . . .
But love your enemies, do good to them, and lend to them without expecting to get anything back. Then your reward will be great, and you will be sons of the Most High, because he is kind to the ungrateful and wicked." (Luke 6:30, 35, NIV)
.....unquote....
On the question you asked about "when did the scripture mention this conflict?" I am not so sure the context of the conflict you are referring to? Don't want to go off on a tangent...
I don't have any feelings of animosity for other religions or beliefs, I just believe that the messages from Allah culminated in the Quran for all humanity and the Torah, Psalms and the Bible were specifically for the Jews, as they were the only Nation of people that believe in the One True God since the times of Abraham.
If I have not addressed your point do let me know.
Peace to you, IAmZamzam.