We respect other religions, but we don't accept them because what there is only one God which is Jesus. For example, when you have a father, will you accept any other guys as your father as well? Since we know that there is only one God, and we don't need to accept any other religions. However, we don't fight against them, but we will respect their 信念 as well.
I think once you believe in one religion, and you won't accept any other religions.