Next time you're in Washington try counting all the Greek pediments and ionic columns. Ever heard of Aristotle? How about democracy? Sparta was a Greek city state organized around militarism. Sports was just military training.
The point is that liberal nationalism and theocracy cannot coexist together. You can't have a little of one and a lot of the other. And you certainly can't do it on the political left. The only thing liberals can agree on is economic parity. Beyond that, shit, we can't even agree on what dirty words to use.
Religion in politics is a two thousand year leap backwards.