I wouldn't want to be with someone of a theistic religion.
Do they stink?
No; if I married someone with a theistic faith and had children, and if my wife told our children of her religion and tried indoctrinating them, I would tell our children of the various types of religions and remind them that all religions are beliefs, not facts. I'd be better off with a LeVeyan Satanist or Buddhist.
My dad is of Islamic background and my mother is Greek Orthodox and they're still married, somehow.
Religion isn't a big part of my life and I could certainly be with someone who is of a different faith but they cannot expect me to go to church all the time with them, fast, read the Torah, read the Bible, Koran, Kama Sutra, whatever.
Now that I think about it, I wouldn't mind dating someone of a different faith but I think I'd want to marry someone with indifference to religion or no strict views or whatever. Thinkin' of the kids.
I personally am a Muslim, but of more a "liberal" type. I dated a Christian twice and it was fine, religion wasn't a big issue. I would hate it if he were to shove his beliefs up my face, just as he would hate it if I pushed the Quran in his face.
So yeah, I'd say I'm fine with dating others from a different religious background. As for marrying though, it would all depend on the non-muslim in the r/s itself. In my country, a person who is a Muslim is only allowed to be married to another Muslim, so the non-Muslim in the r/s would have to convert which I think, not cool man, not cool.