From what i have read and heard from those that should know is often they tell the bomber that if they fail their family will be killed .
AQI is notorious for threatening & kidnapping families to coerce suicide bombers, or IED planters. They used a remote detonator on a boy riding a bicycle - they kidnapped his sister, and told him to drive his bicycle close to our convoy. They were testing the range of our electronic counter measures, and they were using a child to do it. They like to exploit widows, and defiled women too - tell them it will make up for their shortcomings.
Face it, profiling is the only way to guarantee safety ... sorry, but there it is. And even that's not 100%. Still waiting for the sympathetic liberal educated daughter of a prominent white person to become subverted secretly and volunteer for implants. Wouldn't shock me at all - same mindset that burns US soldiers in effigy at their college protests.