That is another topic altogether, but the most immediate aspect is, you don’t get the millions on millions that you got via the Transatlantic Slave Trade, if the Islamic ethic of taking slaves only from the end point of an exhausted war were applied. From the Islamic way, you’d only get about 0.1% of the Indusrial Scale Deliberate Transatlantic Slave trade. Yet Alt Right Revisionists are trying to pin on Muslims, what they themselves did to the max. aka enslaving tens of millions.
You can start a separate topic on how slavery in Islam is bad, and how it is as bad as takign slaves for the sake of taking slaves, as per Eureopean / Western slave trading.