You do not have to believe it before you respect it. Respect other people's opinion and beliefs.
There is never going to be a time where everyone in the world would have the same opinion on everything. There is never going to be a time where everyone would have the same belief. Differences in beliefs and perspectives will forever abide.
The only thing that can help us live together in peace is to accept our differences and respect them.
Religious intolerance has caused a lot of killings because people have not learnt to respect other people's beliefs. Racial and cultural prejudice abide because we have zero tolerance and respect for other people and their culture.
You may choose not to like it or accept it. That is cool, but learn to always respect what other people hold dear to their hearts.