The teaching that diminishes the urgency for reaching all the unreached peoples of the world with the only news that can save them is a teaching that opposes people. Listen to these severe words spoken by the apostle Paul about what it means to "oppose all mankind." He says that those who killed the Lord Jesus "drove us out, and displease God and oppose all mankind by hindering us from speaking to the Gentiles that they might be saved" (1 Thess. 2:14-16). This is what people do who tell us that the nations don't need to hear about Jesus in order to be saved. They oppose all mankind. Oh, how we need to let the Bible define what love does!
