I don’t know much about Islamic history, but Christians definitely did forced conversions.
https://en.m.wikipedia.org/wiki/Alhambra_Decree
https://en.m.wikipedia.org/wiki/Spanish_Inquisition
Spain forced Jews to convert to Christianity or be exiled. I believe they did the same to Muslims.
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Not entirely certain, but I think historically, Muslims might have been more tolerant than Christians