Muzzies will not be wise to drive around in a vehicle with that on it. However, it's fine with me if they want to identify themselves.
On terrorism, the agnostic writer, Martin Amis, wrote that he suspected "there exists on our planet a kind of human being who will become a Muslim in order to pursue suicide-mass murder", and added: "I will never forget the look on the gatekeeper's face, at the Dome of the Rock in Jerusalem, when I suggested, perhaps rather airily, that he skip some calendric prohibition and let me in anyway. His expression, previously cordial and cold, became a mask; and the mask was saying that killing me, my wife, and my children was something for which he now had warrant."
NOTE---The most famous Islamic site in Jerusalem is the Dome of the Rock (Qubbat as-Sakhrah). An impressive and beautiful edifice, the Dome of the Rock can be seen from all over Jerusalem. It is the crowning glory of the Haram es-Sharif ("Noble Sanctuary"), or Temple Mount.