The law is quite clear on this. He could face years in prison for providing material support to a terror group. Since we are currently fighting them he may also face treason charges. The amount is not the issue, giving even a penny to dasch COULD result in a death sentence.
I think he knew that. It was his choice and now he will pay a huge, life changing price. If he was making some kind of political statement then he should do his time. If he is going to whine about how unfair the government is for punishing him because he is aiding our enemy... well, That little boy has a lot to learn about running with the big boys. They will teach him in prison. Or he can always go to the glorious Islamic State. That would also be educational.