Rather than making useless calls about weapons imports, what the Crown Prince should have done was impose a 1 year moratorium on selling oil to any nation that is still supplying weapons to Israel 72 hours after his announcement.
Nations around the world would need to make a choice whether their support of genocide was more important to them than using cars and trucks. A year is a very long time to go without oil. I don’t really picture Biden taking many rides around DC in his ultra heavy armored limo with the secret service out behind pushing the car because there is no gas anywhere.