Ultimately the question is whether one will serve God or the state. In ancient Rome the officials didn't care how many gods one worshiped, as long as his final allegiance was to the Emperor. When Christians put Christ before the state, with allegiance only to Him, it was seen as treason, and worthy of death, so that they were hunted down and put to death in the cruelest manner. Today the state has become god to a vast number of citizens, including many church members who seek the approval of the world and the security which the state promises. The time will come when even some who profess to be Christian will look upon the faithful disciples of Christ as radicals and enemies of society.
Evangelism is an integral part of the Christian way.
It was Christ who told the disciples to go and make disciples of all nations. It is the clear teaching of Christ that all who are not reconciled to God through Him are without hope. It is not possible to be a Christian and still be silent concerning this truth. Once a person realizes that the only way to have eternal life is through Christ, he is compelled by a fervent compassion, as well as a sense of duty, to warn those who are still unforgiven and thus in mortal danger of dying in that condition. To refuse to do so is not only disobedience, but it indicates that either one doesn't believe Christs' message, or he is shamefully unconcerned with the fate of his fellow man.