I’m a Persianist first and foremost, but I also spent time living in Oman, and it seems ludicrous to me that the legitimacy of the way that Gulf Arabs refer to

I’m a Persianist first and foremost, but I also spent time living in Oman, and it seems ludicrous to me that the legitimacy of the way that Gulf Arabs refer to the body of water bordering their countries (al-Khalīj al-‘Arabī, “the Arabian Gulf”) should be challenged. How could we possibly demand that one name or the other be used everywhere in the world?