Division

 51“Do you suppose that I came to grant peace on earth? No, I tell you, but rather division [between believers and unbelievers] Luke 12:51 Zondervan. The Amplified Study Bible . Zondervan. Kindle Edition.

There really are only 2 kinds of people. Those who believe in Jesus and become followers of him and those who do not believe in him. There will always be this division among people which will cause unrest and at times violence. Persecution of believers began with the Roman Empire that mistreated and killed Christians. When Constantine made Christianity the religion of his empire there was a time of peace until the Muslims began to invade other countries and persecute the Christians. The persecution continues today as the Muslims seek to dominate the world and use violence to try to force Christians to recant their believes and accept Islam. There will never be peace on earth until Jesus rules over every person and nation. We as believers look forward to the day of his return to rule for 1000 years and bring peace. He is the Prince of Peace and his kingdom rule will never end.