“In 17th-century England, talking about Islam was a way of criticising the powers that be. When an introduction to the first translation of the Quran described a ‘leader of a band of fugitives’, was it aimed at the Prophet or Oliver Cromwell?”

L'Alcoran de Mahomet, André du Ryer, 1647.
The first English translation of the Koran was not from an Arabic text but a French translation of Arabic.

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The important take away from this is the denegrating tone toward Islam in the 17th century.