Aaleel wrote...
I bet they weren't putting each other down when they first met, or on their first dates. I'm sorry if I'm trying to romance someone I just met and they tell me they're really into church, and I say God is only a ficticious being made up to get money from dumb people. That person is not going to continue seeing me, I'm sorry.
People don;t speak their full mind during the feeling out dating process,they do it once they're in.
Challenging their beliefs is not quite the same thing as putting them down. The rivalry romance path can be very engaging in some cases because its the route that lets you challenge them on something that you feel they are just being wrong about.
For example you're romancing Alistair. He is firmly convinced to the core of his being that swooping is bad. But you know he's wrong. There are many times when swooping is quite good. Eventually the tension gets so thick you throw him down on the ground and
swoop the heck out of him. Alistair is later forced to admit that maybe swooping wasn't so bad after all.

More seriously, the rivalry romance really wasn't all that different than challenging Leliana's faith in her visions, Zevran's casualness towards murder, hardening Alistair, or teaching Morrigan that being close to others isn't all bad. In all those cases you can take some dislike hits but still romance them.
Besides, half eaten cake heals all wounds.