Two points, because I am being bombarded with people saying the same thing about today's horrific attack, that the response should be to ban Arabs from driving cars in Jerusalem:
1. Plenty of Israeli citizens are Arabs, most of them law abiding and decent people, you can't just ban everyone from driving a car. I regularly travel on local buses where the drivers are Arab citizens of Israel, many Israeli bus and taxi drivers are Arab, as are many of the passengers. Someone charging in to a Light Rail station in Jerusalem, especially that part of Jerusalem, was in fact just as likely to hit Arab passengers as Jews.
2. Why the Light Rail again? Why has it been attacked over and over again in recent months? Many reasons but this is what springs to mind right now, it is an easy target, running through or near many Arab Jerusalem neighbourhoods, so opportunity is certainly a factor. It is also a symbol of the united city and of coexistence, connecting Jewish and Arab neighbourhoods with both the modern city centre and Old City.