This dissertation focuses on the 'theo-political' core of US Christian Zionism and Jewish Religious Zionism. The political militancy characterizing two Millenarian/Messianic movements such as Christian Zionism and Jewish Religious Zionism constitutes a still under-researched and under-theorized aspect that, at present, is paramount to address for its immediate and long terms implications in the highly sensitive and volatile Israeli-Palestinian issue, in the US and Israeli domestic domain, and in the wider international community. Although processes of the 'sacralisation of politics' and 'politicisation of religions' have already manifested themselves in countless forms over past centuries, Christian Zionism and Jewish Religious Zionism are unprecedented phenomena given their unique hybridized nature, political prominence and outreach, mobilizing appeal amongst believers, organizational-communicational skills and degree of institutionalization.