"Then Simeon blessed them, and said to Mary His mother, 'Behold, this Child is destined for the fall and rising of many in Israel, and for a sign which will be spoken against (yes, a sword will pierce through your own soul also), that the thoughts of many hearts may be revealed.'" - Luke 2:34-35
That was the priest Simeon prophesying about Jesus. Later Jesus says:
"Do not think that I came to bring peace on earth. I did not come to bring peace but a sword." - Matthew 10:34
The world is certainly in an uproar over what Jesus did 2,000 years ago, down to the level of divided families.