Whoa, people, let's back up the bus a bit here. Eric, you are pissed because you say that she discriminated against you. It's fine that you are annoyed that she broke up with you, but dating is by definition discriminatory. Me, I am not gay, so I discriminate against men. Others don't like black/white/Hispanic/Asian chicks. Some guys like big tits while others like small ones. All of this is discriminatory and none of it is any more or less nefarious than the choice made by your ex.
After all, to my knowledge, Congress has not extended the Civil Rights Act to dating. And there is good reason for that. Dating someone (and perhaps getting married one day) is an intensely personal decision. We make these decisions based on some of the stupidest reasons. I personally have broken up with girlfriends for a variety of dumb reasons, including 1) she ate nothing but carbohydrates, 2) she hated sports, and 3) she was afraid to fly. In my estimation, however, none of these are as legitimate as the reason cited by your girlfriend.
Though you do not place religion high on your list of priorities, that does not mean that others do (and should) not. That decision should be respected, and the fact that you cannot respect her reason for dumping you now implies at least to me that you would never be able to respect her religious beliefs. Let me tell you, friend, that is not a good foundation for a relationship.
So ultimately, one of two things were going to happen with this relationship: 1) you would break up at some point for some other reason; or 2) you would get married down the line (if she is Baptist, she is not going to just continue banging you indefinitely without a pastor involved). If it was going to end somewhere down the line anyway, what do you care. Go out and find yourself some heathen blond that likes sex a whole lot more than this prudish little bitch. All she did was save you time.
If you could have gotten married, she just saved you a whole lot of grief. Along with marriage (or any long-term commitment, for that matter) comes discussion of where is the ceremony going to be, what are the kids going to be, will you convert. If you are not on the same page, these discussions can get ugly and often lead to the end of the relationship. Its better that she figure out that she does not want to have children with someone not of her faith now rather than later if only to save you the alimony payments.
In conclusion to a very long message, Eric, don't be pissed either at your ex or at organized religion as an institution. Frankly, her religion just gave you a gift: it allowed you to weed out someone who was not meant for you anyway. Now go out there and find some little Athiest that likes to give head!