Let us use a supposition to address this argument. For comparative argument, let us evaluate the principle claims of a religion such as Christianity and its tenets as the only relevant and authentic religion of whose adherents are taught to make this assertion as a religious mandate. Suppose we assume that this is the case (pay no attention to the reality of its copious factions and brands).
Through oral history, many indigenous communities discuss a relationship with Chineke (God/Goddess). These people did not have a relationship with Jesus Christ as the only medium through whom God’s mercies and blessings can be invoked, nor did they know of Christ’s existence. These ancestors eventually died before the coming of the Christian religion unto their shores. Given the premise that there is no other route for approaching the grace of God but through the son, suffice it to say that all these ancestors are doomed for hell as their final destination. The notion that the Christian God created humanity and created the different geographical locations,should place the responsibility of the lack of knowledge of Christ and the geographical incongruity on God and consequently must spare humanity the excesses of hell.
Clearly, Chiism understands that such claims to exclusive truth opens a religion to scrutiny that renders it a basket of fallacy and without a moral compass. A practice that Chiism does not embrace as its modus operandi.