"Interreligious dialogue is a necessary condition for peace in the world, and so it is a duty for Christians as well as other religious communities."
No, Holy Father, it is NOT a duty. It is YOUR duty to make sure that souls are saved and the world converts to the One, True Church. YOU allow them to wallow in their false religions and YOU pat them on the back and even worship with them. YOU will be held accountable for this. To whom much has been given much will be required. You've been given the greatest office on Heaven and Earth, that of Vicar of Christ. One day, you will have to wake up. YOU have to convert and likewise convert others, not to the sentimentality you preach but to the True Church.
How do you propose that we make sure that souls are saved and the world converts to the one true Church if we don't engage them in some sort of dialogue?