Duh . . .
Everyone is entitled to his own viewpoint on this, but I don't care whether the president is Protestant, Catholic, Jewish, Muslim, Buddist, Hindu, etc. etc. What I do care about is having a president who can deal with the mess we're in at the moment with respect to our economic health and relations with other countries. In the last twenty years the world has changed tremendously, and our place in it as well. At the moment, we're not doing too well in dealing with this - just take a look at how our deficit has grown in the last eight years and what has happened to the value of the dollar.
Looking at my own world, my neighbors are Jewish, most of my clients are Jewish, and the two engineers I work with most closely are Christian and Hindu. My last ex-bf and best friend locally is Buddhist, although he was baptized Catholic (his mom is Catholic and his dad is Buddhist), and my bf before that (still a friend too) is Shinto.
I collaborate frequently with a couple of Iranian-born Americans who are Muslim, and I couldn't ask for two more thoughtful and nice people. One is religious, the other isn't, but neither makes an issue of it. On a rare occasion when we did talk about religion, one of them made a point to say that when he was raised in Tehran he knew families who were Sunni, Shiite, Jewish, and Christian, and that his parents would not allow any bad talk about other's religions. Both of these guys are straight and married, but are completely accepting of gay people.
IMHO religion and politics are a bad mix, and viewing other's religions with courtesy and respect and avoiding fearmongering goes a long way.