Act out of love and respect people of other faiths.
Something to think about
The mystery of God is a marvellous thing. So often we try and pin down God to a few 'facts'. Yes, we know about Jesus’ life and death. Yes, we have the Bible. But do we really know God? In the Old Testament we are told that we cannot speak the name of God. This is not so much because we are not allowed to but because God is so big and mysterious we literally are not able to describe or name God. God is so vast and mysterious that every name we try out for Him/Her is just a stab at clarity.
To paraphrase Paul, God has been revealed in the flesh, proclaimed by the most unlikely of people and believed throughout the world. Something (for want of a much better word) that can be seen and proclaimed by so many, in different places and contexts, has to be vast and ineffable. There has to be a possibility that people of different faiths and cultures have some vision of the truth, too.
It is far too arrogant for my liking to assume that Christians know it all and people of other faiths are lacking the truth. Yes, Jesus revealed God to us but rather than providing us with a sole ownership of truth, he showed us how to live and be a pillar of truth.
The bottom line is people may believe in different things (even within our own faith) but we know how to live; truthfully, with integrity and justly. It can be a tricky mix but if we act out of love, the rest often falls into place.