And you're are plainly in denial... For as long as I've lived (35 years and counting), these guys (pakistanis, egiptians, iraquis, iranians, palestinians, etc) have been walking into a crowd and blowing themselves to pieces along with as many of their 'infidels' they can take with them. It is always motivated by religion, and fueled by intolerance. This is not something new. You could read a story about an atrocity like that happening pretty much every month for the past 30+ years.
Do you really think that you're just going to walk in there and change decades of their culture and religion in one big swoop?
You must truly be delusional.