It should be possible for the state to make life absolute hell for these Jihadists. Why is it not done? Every infidel country should do that and drive these people out and keep them out with stricter border security. A lot of terrorism is financed by wealthy individuals and possibly even state level actors in the oil rich Persian gulf region. That's yet another excellent reason to wean ourselves off fossil fuels. Lets starve the terrorist financiers and save the climate while at it.