As for Arabist racism. Islam is an Arabic religion. Allah is an Arabic god. The Koran 'can only be understood in Arabic'. Muslims must have Arabic names and even dress in an Arabic manner.
Check your history and then see what contemporary examples of Arabist racism can be found in Saudi Arabia and other Arabic states, as well as what has happened in the Sudan, etc.
Circa: 14th century AD (in green and dark green):