They ground their ideas in rational thinking and (nonreligious) moral argument. And the conservative movement is crippling itself by leaning too heavily on religion to the exclusion of these temperamentally compatible allies.
This is because, in part, the number of non-believing conservatives is dwarfed by the number of believing conservatives.
Politicians, like Willie Sutton looking for money in banks, go where the votes are. If you're a conservative, it's with believers.
---- President Ronald Reagan, Prayer Breakfast 1984