Arabs and Somnath
Claim: When Mahmud of Ghazni attacked the Somnath Temple, Arabs joined in the defence of the temple and died to protect it. The fact that Somnath was a Hindu temple did not matter to them.
Facts: That idea that Arabs died to protect Somnath temple from Mahmud Ghazni originates from a 20th century fictional novel. According to real historical records, Arabs actually provided valuable intelligence to Mahmud Ghazni.