The Bible might not really advocate theocracy, but I'm pretty sure the fundies are consistant with their beliefs in this case here, the Bible spells it out pretty clearly that they need to do this...
Yeah, the bible is extremely clear about how the USA must ensure that Israel commands the entire holy land so that it may be attacked by the full force of Gog and Magog (often identified as Russia (although more commonly in earlier PMD books the Soviet Union) and
Ethiopia and Libya)
and see them destroyed (preferably without
anyone actually caring; that would get in the way of the next few steps by removing all those doubters to be cast into fire) before they make a discovery that makes their land the most fertile in the world bringing them enormous riches (because, as we all know, China's current prosperity is due to their
peasant farmers). This discovery leads to
widespread and universally accepted peace, which is one of the cues for the rapture to happen and a One World Government to form under the anti-Christ (singular of course, because when the bible only talks about anti-Christs in plural it's obviously in the context of a very literal figure only described in opaque metaphor), who promises peace and disarms the world while signing a peace treaty with Israel (which is the capital of the OWG they just made peace with).
OK, so that isn't the only 'literal' reading of Revelation (mixed with other biblical verses that are
obviously end times prophecies if you completely ignore their historical context) but it is the most popular.