Because one seeks to promote principles I agree with and the other has worked very hard to destroy those principles. It has nothing to do with their "religion". Jimmy Carter was voted for by many believers because he was a "Christian". I think his record speaks for itself.
Thinking gay marriage and abortion are okay tells me there is a bit of false teaching coming from Obama as well. As I said, I'm not electing a spiritual adviser. Perhaps you should put up a poll on the greatest issues facing our nation today. . .
I'm voting for the person who will lead our country. As stated, I'm not voting for a religious leader. I am voting based on record, based on history, based on evidence. I am voting based on what I think will be best for our COUNTRY. I am not blind enough to vote purely based off the claim of one candidate on their religion.
To vote against Romney purely due to his mormon faith, without looking at what he would do for the country seems ignorant. (I don't mean to offend anyone. If I offend you, I'm sorry, it is not my intentions.) If you look at their record, see what they have done, see how they have lived their lives, see who their friends are, see what their influences in life are, and you still think that Obama is the better candidate, then by all means, vote for him.
However, if you are voting purely on the CLAIMED religious affiliation of the candidate I think you need to look more into their actions (which if the claimed candidate was Christian, you should know by his history).
I am NOT pro Romney, however, I don't believe our country can last another 4 years with the current president.