If Ahab the local fisherman would denouce the terrorists it would be very easy to know that he's not one of them.
In the US, if we speak strongly against the actions of the gov't, we risk retribution. This administration has shown that it is more than willing to attack one's career and livlihood if you counter it enough to make an impact. This is minor compared to the threat of death that a "dissentor" experiences in the Middle East. We have occupied Iraq and that breeds and entrenches more and more terrorists. If you are an Iraqi and proclaiming your love for the occupieing country and your hate for Iraq's own insurgancy (whether or not you and I think that it's right), you will likely be killed. So it's not as easy as you all candy-coat it.