HaDag Nachash is an Israeli hip-hop/reggae/rock band that has been around for a while, I've seen them live a few times, and while they're very politically left-wing, sometime their message is timeless.
This song is crying out about the negativity found in current Israeli society. Basically they feel that current divides are killing us as a whole and we've forgotten that we are "brothers". The video uses death announcements to show the lyrics - forcing one to pay attention to them and reinforce the message that we are killing ourselves at the same time. The video is just as profound as the song itself.