Put him in the slammer for 20 years, then revoke his citizenship, and send him back.
Indeed. However on another day we could have any number of dead cyclists selected at random on a fool's mission in the name of some pathetic deity that doesn't belong in the modern world and which doesn't and never has existed. That deserves a rather more
permanent solution imo. This knobhead can never be cured and if he's dispensed with the earth will not wobble on it's axis one bit.
However if we are to ignore popular opinion by keeping this fecker alive for 20 years lets make it as little a burden on the taxpayer as possible and keep him in the cheapest manner possible. A nissan hut on South Georgia with minimal supplies air dropped every month being my preferred option for him and his sort (tbh if I was the pilot charged with this task I'd like as not drop any supplies in the south atlantic). No expensive prison officers on an island (owned by this nation) with a dreadful climate, at least 1000km from just about anywhere else and with no communications of any sort. Perfect.