Non veni pacem mittere, sed gladium.
Who is Matisyahu? What have I missed? Am I hopelessly living in the past? I do listen to dystopian remakes of past classics like this https://youtu.be/u9Dg-g7t2l4
Never heard of him myself before this video, but I'm out of the loop, so no surprise there. Sounds like a good song to me.
Matisyahu's a rapper who happens to be an Orthodox Jew. He used to look like this, but changed his look to what you see above: http://cdn1.ticketsinventory.com/images/last_photos/concert/M/matisyahu/matisyahu_tickets_13032925672869.png
Though I think he was also on vacation in the OP video