> Christianity forbids usury as well
[O]ur Lord, according to Luke the evangelist, has bound us by a clear command that we ought not to expect any addition to the capital sum when we grant a loan. For, that is the real meaning of usury: when, from its use, a thing which produces nothing is applied to the acquiring of gain and profit without any work, any expense or any risk.
– Lateran V
[The following proposition is condemned as erroneous:] Since ready cash is more valuable than that to be paid, and since there is no one who does not consider ready cash of greater worth than future cash, a creditor can demand something beyond the principal from the borrower, and for this reason be excused from usury. – Various Errors on Moral Subjects (II), Pope Innocent XI by decree of the Holy Office, March 4, 1679 (Denzinger)
One cannot condone the sin of usury by arguing that the gain is not great or excessive, but rather moderate or small; neither can it be condoned by arguing that the borrower is rich; nor even by arguing that the money borrowed is not left idle, but is spent usefully, either to increase one’s fortune, to purchase new estates, or to engage in business transactions. – Vix Pervenit, encyclical of Benedict XIV
More here if anyone's interested: https://tinyurl.com/2f6dkh5p
The turning point was probably around the same time the Church came around on Liberal republics replacing kings and queens.
It sure looks like direct words from Jesus to me, not to expect anything in return for a loan. It’s just that Christian culture chose to ignore this rule in exchange for capitalism and colonialism.
“And if you lend to those from whom you expect repayment, what credit is that to you? Even sinners lend to sinners, expecting to be repaid in full. But love your enemies, do good to them, and lend to them, expecting nothing in return. Then your reward will be great, and you will be sons of the Most High; for He is kind to the ungrateful and wicked. Be merciful, just as your Father is merciful.” - Luke 6:34-36 NIV
The Old Testament’s anti interest framing is quoted as “making a profit off a loan from a poor person is exploiting that person (Exodus 22:25–27)” alternative translations: https://www.biblehub.com/exodus/22-25.htm but poor person is an interesting exception. Loaning money to a rich person is hardly exploiting them so a Bentley dealership offering car loans on 250,000 car seems perfectly acceptable.
Contrast that with the usury wordings in Islamic scripture where it is treated essentially the same as stealing, and it's not worded as a friendly suggestion but rather a strict proclamation. Those differences in scripture make it clear why the different religions see it so differently.