He's a photographer.
Seems he's already been captured once, thought he was going to be beheaded and luckily rescued.
So what does he do next - yes go back to do his job (brave) and thus gets captured again (stupid).
Taken from Wiki -
John Cantlie is a British war photographer and correspondent who was kidnapped by British Islamic extremists while crossing into Syria on July 19, 2012, near Bab al Hawa. Along with Dutch photographer Jeroen Oerlemans, Cantlie was shot while trying to escape their captors. In an interview with The Sun newspaper on 26 August 2012 Cantlie said it was "every Englishman's duty to try and escape if captured." Both photographers claimed they were about to be handed over to a jihad unit affiliated with al-Qaeda for ransom when they were rescued by the Free Syrian Army. Cantlie's kidnap is the first recorded case of a British journalist being held, shot and then rescued from fellow Britons during the revolutions of the Arab Spring.
The pair were held by the jihad group al-Dawla al-Islamiyya (The Islamic State) whose leader, Abo Mohamad Al-Shami, encouraged British Muslims to join the group to fight a Holy War against the government of Bashar al-Assad. It is alleged the group used the cover of online aid agencies to smuggle European fighters across the Turkish border into Syria. In an account in The Sunday Times on 5 August 2012, Cantlie wrote: "I ended up running for my life, barefoot and handcuffed, while British jihadists - young men with south London accents - shot to kill. They were aiming their Kalashnikovs at a British journalist, Londoner against Londoner in a rocky landscape that looked like the Scottish Highlands. Bullets kicking up dirt as I ran. A bullet through my arm, another grazing my ear. And not a Syrian in sight. This wasn't what I had expected."
Oerlemans was shot in the left leg and Cantlie in the left arm during their escape attempt, Cantlie suffering ulnar nerve palsy (loss of feeling and use to the hand) as a result. In an account of the shooting, Oerlemans says some of the British Muslims stood over him holding a rock as though to smash it onto his head and shouted, "die, kaffir, die!" Oerlemans then stated that "the British guys were the most vindictive of them all." They were taken back to the camp where a fighter who claimed to be an NHS doctor stabilized them and treated their wounds. The pair said the doctor gave them information and extra food. Cantlie later wrote in the October 2012 edition of FHM magazine that this was Stockholm Syndrome, where a hostage befriends one or more of their captors.
They were subjected to mock executions, beaten and at one point believed they would be beheaded when their captors started sharpening knives. "I honestly thought that was it," Cantlie wrote in The Sunday Times. Then on 26 July, one week after being kidnapped, they were rescued by four members of the FSA. The rebels came into the camp shooting their weapons and held at least one jihad fighter at gunpoint while Cantlie and Oerlemans were helped into a waiting vehicle. Both photographers had to be assisted as their feet had been seriously injured when they tried to escape and neither could walk. They had lost all their camera equipment, passports and clothes in the incident, and were smuggled back across the border at a crossing used primarily by Syrian refugees. They were initially treated by a medic for the New York Times in Antakya before being debriefed by Turkish and then British intelligence.
One month later Abo Mohamad Al-Shami was killed in unclear circumstances, reportedly by an officer in the Farouq Brigades, a rival jihad group. Reports say he was kidnapped by the unit, held for three days and then executed by repeated stabbing in the stomach. His body was recovered and buried by his brother in the area near to the Syrian town of Samarda. There were unconfirmed reports of British special forces operating in the area at the same time, while the members of al-Dawla al-Islamiyya headed south for Homs or left Syria soon afterwards. On 9 October 2012 an individual suspected of being involved in the kidnap was arrested at Heathrow airport after arriving on a flight from Egypt.
This was Cantlie's second visit to Syria.
If I were him, I most certainly would not have gone back the thitd time.