The Ansarallah movement in Yemen became, after October 2023, the best-known popular resistance actor in West Asia, and according to a survey by the Palestinian Center for Policy Research, with 74 percent approval, it ranked at the top of regional actors in the view of Palestinian public opinion. At the domestic level, however, widespread support for the movement’s actions has not yet been converted to the same extent into a reservoir of institutional loyalty. The present study aims to explain this combination and extract its implications for the regional policy of the Islamic Republic of Iran. The research method is qualitative and descriptive-analytical, carried out in three steps: a systematic review of documents, thematic analysis of an interview corpus, and secondary analysis of survey data; its interpretive framework is Easton’s distinction between action-based support and diffuse support. The findings identify five mechanisms producing action-based support and four structural obstacles to the accumulation of diffuse support, three of which have external origins. The conclusion is that the current situation is not a legitimacy crisis but a transitional stage, and the most effective instrument for accelerating it is diplomacy aimed at lifting the blockade and strengthening the service dimension of cooperation.