For decades, a persistent belief has circulated throughout the Muslim world: that powerful Zionist groups ultimately seek to remove Islamic control from Jerusalem's Al-Aqsa Mosque compound and replace it with a Jewish Third Temple. Supporters of this view argue that the rebuilding of the temple is linked to messianic expectations and a future religious order centered in Jerusalem. Israeli officials have repeatedly denied any state plan to demolish Al-Aqsa and have publicly reaffirmed the long-standing "status quo" arrangement governing the site. Yet the rise of religious-nationalist movements, increasing visits by Jewish activists to the compound, and growing calls for Jewish prayer rights have intensified fears among Palestinians and Muslims worldwide. This investigation examines the origins of these concerns, the evidence cited by both sides, and whether the fear of a future Third Temple replacing Al-Aqsa is rooted in documented developments, religious aspiration, political rhetoric, or a combination of all three.