Christ’s soteriology [i.e. saving work] is focused and exclusive… It is exclusive to sinners. This is because “those who are well have no need of a physician” (Matthew 9:12; Mark 2:17, Luke 5:31). The non-inclusive and non-universal voice is not a slap at other religions, such as Buddhism and Islam. The non-inclusive factor is instead a barrier to the non-needy people, or better, to the needy people who do not realize they are needy.
Paul Zahl “The First Christian”