What does your religion teach about other religions?
What does it teach about folks from other religions living among you if yours is the dominant religion?
Romans 12:18: Do all that you can to live in peace with everyone.
1 Timothy 2: 2 First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for all people, 2 for kings and all who are in high positions, that we may lead a peaceful and quiet life, godly and dignified in every way. 3 This is good, and it is pleasing in the sight of God our Savior, 4 who desires all people to be saved and to come to the knowledge of the truth. 5
The bible teaches Christians to pray for other people; even if they are apart of a different religion. As Christians we are not to persecute others, say because they are from a different religion.
All Christians are required to do is just speak the truth of the faith, and if people do not desire it or care for it is okay. Does that mean going around parading up and down the streets of being a Christian, or to everyone you meet?
( I personally do not go around and do those things just express the faith by trying to live by the spirit and allow Christ to live through me and allowing me to by the spirit have love; joy; peace, kindness, forgiveness, mercy, forbearance of others, patience. )
As Christians we suffer for the sake of Christ as well; not every one desires to have anything to do with us as believers, people will hate you because of Christ, and that is just something that can not be done away with.
Just as if it was a different topic such as politics and people dislike each other because of their own view points or whatever.
Those two scriptures shared is some of the Christian Philosophy dealing with living by the spirit; living in peace with others, and also praying for all people.
Optimistic maybe, do you believe any of this? Everyone must decide for themselves what it is they desire, in this world. Some people choose to follow the God of the Bible, and Jesus Christ, some people choose otherwise, and no judgement here.