> Many Twitter users live in Saudi Arabia and some users of Saudi nationality or descent live outside of Saudi Arabia, including in the United States.
It's kind of surreal to use "Saudi" as the demonym for the people of Arabia. "Arab" would be normal. The language is Arabic, the country is Arabia, and those are both named after the people, the Arabs. The "Saudi" in the name of the country refers to the royal house, the House of Saud, and I would expect a "person of Saudi descent" to be Arabic royalty, not just any old Arab.