article_snippet: The Marine, who was known to be outraged by the atrocities committed by the fanatics of Islamic State, was also questioned by police on arrival in the UK and then returned to his unit, 45 Commando, in Arbroath, Scotland.
article_snippet: It is believed his left the US Marines in California just weeks later.
article_snippet: It also emerged that his was questioned by police last October on suspicion of going to Syria to fight jihadists.
article_snippet: his was preparing to fly from the US to Turkey after contacting a Kurdish group on Facebook.
article_snippet: his was returned to his unit in Arbroath, Angus, but decided to leave the Armed Forces before Christmas so his could travel to the war-torn region to fight.
article_snippet: Last night a fellow Royal Marine said: 'a fellow Royal Marine was very angry about the Middle East and the Islamic State. '
article_snippet: As a unit we had been on standby several times but nothing happened and his was frustrated that the UK was standing back.
article_snippet: his was a very focused and good Marine, but the Islamic State was his priority.'
article_snippet: It is believed that more than 100 western fighter have joined the Kurds in Syria in the fight against ISIS.
article_snippet: Pictured are ISIS militants parading through the streets of Raqqa .