Delta Air Lines planes.Andrew Kelly/ ReutersDelta Air Lines has apologized after a perceived anti-Palestine social media post.A since-deleted reply from Delta's official account called the Palestinian flag terrifying.Delta has since revised its uniform policy to only permit US flag pins.Delta Air Lines has issued a public apology for a perceived anti-Palestinian social media post.Earlier this week, a post on X shared images of two Delta flight attendants wearing Palestinian flag pins.The post, which incorrectly equated the Palestinian flag to the militant group Hamas' flag, read: "Since 2001 we take our shoes off in every airport because a terrorist attack in US soil.