I think that religion has no place in democratic politics, and the two should be kept well apart.
This is because religious assertions and dogma are absolute, irrefutable, and are considered the 'will of god,' completely the incompatible
opposite to democracy - the will of the people. If leaders begin to use religious doctrine in their policies, then you innevitably have the scenario
where opposing such policies is deemed a heretic act. ie "If you're arguing with me, you're arguing with God", and the democratic process becomes
impracticable, paving the way for a theocracy. Thats what I reckon anyway.

