The Dome of the Rock is in Occupied Palestinian Territory (East Jerusalem) under international law. How is showing a Palestinian flag flying above a mosque used by Palestinians offensive to Jewish people? It's odd that the article is alleges the existence of Israel is denied but then puts Palestine in quotation marks, as though it doesn't exist.

It's not though, this is in the UK and UKLFI never says the people offended were Israeli. They said they filed the complaint "on behalf of some Jewish patients" who felt victimized. UKLFI's complaint specifically says they felt victimized because they are Jewish: "it is offensive for Jewish people to see a Palestinian flag over their holiest site."