Yeah, I know. There was actually no such thing as a "sheik", neither as a title nor as a clothing stereotype (Dishdasha-tunics, ighal-fillets et al.) to begin with at this time. The earliest depictions even remotely looking like the commonwealth Arabian noble dress originated in late-Parthian to early Sassanian times at best through a bas-relief depicting actual Arabs. It was a completely unnecessary addition to the film, serving as a "precedent" to Alexander's ambition to conquer "Arabia" (Which is a gross over-simplification to a national entity with no formal existence at the time).
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