Stick up for what you believe, especially when it feels like a pretty huge revelation. What applies to the work you do on math tests also applies to your belief system.
Backing down to “make nice” does nobody any favors, and will end up making you unhappy.
Open-mindedness and a willingness to try to understand a person’s position (even if you disagree) are good qualities, even if it’s not the most pleasant experience at the time.
[Note: the “you” in the above is not an external “you.” There’s a distinct possibility that I’m talking to myself here.]