Religious diversity is a problem simply because there are always groups that claim to understand “the ultimate truth”. There are three (prevalent) approaches to religious diversity: exclusivism, inclusivism, and pluralism.
Exclusivism says the highest truth is only found in my tradition – “I’m okay but you are not (so I need to save you)”.
Inclusivism says that there is some truth and goodness in all traditions, but mine is the most true – “We’re all okay, but I’m the most okay (so I need to convert you)”.
Pluralism says that the highest truth and goodness is found in multiple traditions and none is superior to the others – “We’re all okay (so I need to learn from you)”.
Abraham Velez de Cea (The Buddha and Religious Diversity)