If you are close to a young person caught in the grips of a dangerous ideology, you may feel a moral responsibility to show that young person a way out. Here are some tips based on experience teaching young adults and research into the subject.
First, resist the temptation to reason. It is not an inability to reason that leads people to these positions. They are motivated instead by deep, often latent psychological drives, such as the desire to belong or be part of what has been portrayed as an important crusade.