Indeed, these are rather tricky questions to try and answer. The question usually develops after the gospel is explained and when the listener realizes it is only those who hear and respond to the message who are saved. It is sometimes a problem of logic. It seems unjust to punish a sincere person. Many simply dislike the use of punishment, especially retributive.
Today there is a general admiration and respect for other cultures and religions.
The seeming self-righteous attitude of Christians can cause antagonism. Always try to defuse an emotional issue before tackling the real question, eg. In no way would I suggest that eastern peoples and their cultures are somehow less than Western. In fact, Christianity had its origins in the East. And he has shown us how in his Son Jesus.