Mixing politics and religion could possibly cause those countries difficulty in foreign relations. They could conflict with another country with religious conservatism over differing views or with other countries they may see as morally wrong because they do not practice the same beliefs.
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I think that international relations would be less common.
@9HXDHFNPeace and Freedom 4mos4MO
Religious conservatism principally applies the teachings of particular religions to politics—sometimes by merely proclaiming the value of those teachings, at other times by having those teachings influence laws