It's not going to help them determine how much of a threat someone is in terms of killing people. It's a very good way of determining how much of a threat someone's likely to be in terms of drawing attentions to the less savoury aspects of Israel's treatment of its Arab population.
Edit: Good guess apparently. Look at the search keywords here: http://mondoweiss.net/2012/06/do-you-feel-more-arab-or-more-...