It is used two different ways. One is the call to murder Jews, the other is a solo effort to be closer to god. I only know this because it is in the UK media of late. The sad part people are using on the pro-Palestinians marches knowing full well it will insight a violent reaction.
EDIT: others are throwing in different meanings in this post. It seems it has many variations. Not being Jewish or Muslim shows I do not have enough of a vested interest to understand all of the context surrounding this.