I'm not going to be so quick to say he was totally innocent. Why did he jump the turnstile; why wouldn't he stop when they told him to; why act like a suspect if you're not? And what was he doing at the address being watched?
You know, not everyone in the suicide bombing business is Muslim or Arab. They have to get supplies from someone, for instance. As an electrician, could this guy have been a supplier of some of the things needed to make, and wire, a bomb? Maybe his motivation was money, not ideology.
I am sure there are thousands of non-moslem useful idiots willing to aid them.