What does God expect us to do for other cultures and faiths?

God wants us to show respects to other cultures and faiths, but at the same time, He wants us to spread the words of God to them. If some cultures are amoral and against God, we need to tell them that anything against God is sin. For instance, the Sawi used to eat human beings and considered that physically killing their enemy was being heroic. Killing a person is wrong because as God said and the Ten Commandments shows that we should not commit murder and we should love our enemies. Thus Don Richardson tells the Sawi about Christianity and the words of God, which changes their unscrupulous behavior and culture. But we are only students and can’t spend years with a group of people that has corrupt culture to teach them about God. We can, however, go to mission trips in summer or winter break or pray to God about them. God expects us to do something even a little thing about them because He knows that each of us can bring a huge impact to those with uncivilized culture and never heard about Jesus Christ.