Secularism is not about total godlessness. It is, more precisely, a model of church and state in which government is not under the control of a church authority, and no churches or individuals are having their religious practice and beliefs, or non-belief, dictated by the government.
Napoleon had a penchant for making the sign of the cross at moments of stress or exasperation. But he was not a churchgoer, and regarded religion as a tool to control the masses, not an answer to life's mysteries. He also regarded papal approval as necessary for his own legitimacy.
My argument and experience regarding the importance of communities of faith being political but not partisan. There is a significant difference. No religious institution should endorse or work against a candidate.
If you are Jewish or Muslim or Hindu and pay taxes, why would you want to pay for buildings and public venues where Christians pray and you don't? Perry is no different than other Christian evangelicals and wants his belief system adopted by, not just all Americans, but the entire world.
In no way am I above this, as I too have leaned on what I think is funny in order to take a swipe at someone with whom I disagree. It can be cathartic and, truthfully, when you hit a snark-homer, it feels awesome.
There is always a temptation to appeal to the sectarian interests of one's audience. America's leaders must resist that temptation and teach that people of all faiths, and those of no faith at all, are equally valued and respected.