I think you're misrepresenting secularism. It represents institutional separation (eg. the government not being infuenced by the Church) rather than the individual drives of people who commonly derive values from their religion.It is sometimes said in my country that politics and religion shouldn't be allowed to mix. When it comes to the voting of everyday citizens, do you believe that one should vote only with "secular" ideas in mind, and not vote based on "religious" ideas? Do you feel this same standard should more or less apply to elected officials? If so, why? If not, why not?
I ask the questions in part because my thinking on this has shifted in recent years. I used to believe that secularism was a thing, but now I'm less convinced of that. What the idea of secularism seems to do is normalize some particular set of ideas about what "religion" looks like, then calls anything outside of that "secular." In normalizing the set of ideas about what "religion" looks like, the resulting construct necessarily excludes the diversity of world religions. When people think of "religion" interfering with government in my country, they think of a religiously-motivated Christian pushing for restrictions to abortion rights or repealing progressive legislation on homosexual marriage. They don't think of a religiously-motivated Druid pushing for renewable energy and staging anti-fracking protests. Both are examples of being political with one's religion in mind - and for those who are against religious interference in politics, neither should be allowed to have a voice because their motives are religious. Or should they?
When people are talking about secularism, they are referring to the impact of institutions on the political process. The reason religiously-motivated Druids pushing for renewable energy are 'ignored' is because they are not negatively impacting on secular ideals.