A nihilistic organization founded by a preacher, Solf J. Kimblee, has reasoned that human beings have fallen short of God's true purpose. Since the betrayal by Adam and Eve, all people are born with original sin and are destined to commit evil at some point in their lives. Therefore, life itself is a sin, and it is the duty of God-loving people to return their brothers and sisters to the earth. They are specifically known for using suicide bombers for their cause. Sadly, technology has reached the point where it is able to detect bombs on individuals, even ones being carried inside the body.
This heinous cult has developed a way to create biological human bombs to bypass technology. Using genetic shenanigans, they have found a way to encode the ability to explode into a person's DNA in utero, like that of a voltorb. This would allow it to avoid being detected by government entities. The cult cannot use animals for this task, as the preservation of the creator's innocent creatures should be of utmost paramount. Therefore, the only logical conclusion would be to use human children.
These future human bombs would be isolated from the outside world and raised to believe that it is an evil place corrupted by sin. Death is the greatest gift they could give to their fellow humans, and that their sacrifice is of the highest honor. At a certain age, they would be sent into the world at designated high population targets. Through a certain trigger, the individual would carry out their duty and explode, killing as many as possible.
How can this group create human bombs in this way?