What do we do with those who thinks and is dead sure that blowing himself up in a crowd is a good idea?

We all are able to see patterns, but seeing patterns is not what solves complex problems. When doctor cuts your rotten fingers and then it happens it didn't help to save an entire arm, there is a pattern too. What does this pattern tell us? Doc wants to cut all your limbs to be sure you're not leaving his clinic, right?