> you should rationally also be able to fully accept evidence that your particular beliefs lead to a negative outcome. If you are both arguing about the outcome

> you should rationally also be able to fully accept evidence that your particular beliefs lead to a negative outcome. If you are both arguing about the outcome of your beliefs, and unwilling to change them with evidence, then you’re either holding a rationally delusional belief, or engaging in deception to trick rational thinkers into adopting your morals. That's a very utilitarian point of view, and most people are demonstrably not utilitarian. The point of moral beliefs is not necessarily to lead to better overall outcomes on average for everybody.