An interesting point from @Jacob_Rees_Mogg If only he knew that Muhammad ibn Musa al-Khwarizmi was of Persian descent and born to a Persian family from Khwarazm. He lived exactly during the era when the Persian population was being forcibly "transitioned" from its Zoroastrian roots to Islam by some friendly Muslim migrants. right around the time Muslim demographics in the region were climbing toward 40%. Historians seem to agree it was his parents that converted to Islam, likely to avoid the jizya and for social mobility. The guy was ethnically Persian, not Arab, and he did not come from a long, multigenerational lineage of Muslims. And it does seem in fact very likely, that his family were also oppressed by invading Muslims.