Communists always thought so. That is why they wanted worship of government. Christianity matured. That began when the Bible was made readable to the masses. And as for the 'theocracy' tripe about nazis, Nazi Germany was no theocracy. The Lutheran Church was not in control. A darwinian worshipper of genetic superiority science was in control. Nazis worshipped science and believed themselves to be the "Master Race".
Islam, however, starts butchering Christians when it controls a government. For example, the recent exodus of Serbs from the Holy Land of Kosovo. Or the Turks slaughtering over a million Armenian Christians. Or the slaughter of Christians in Nigeria. Or the slaughter and mass starving of Christians in Sudan while food rotted in the ware houses. Deliberate starving. And the desire of Islamics to push Jews back into the sea.
All Christians needed was a printing press. Islam can't even get its act together with internet access.