William the French, Hagit the German, Amor the Spaniard, also Judy the Canadian and Xipan the Chinese(-British), let's have a look on these volunteers in war with ISIS.
This is an excellent documentary released in September 2015 (after the Charlie Hebdo attacks, but before the 13th November Paris attacks). Only the original French title is stupid as these guys are certainly not mercenaries. Kurds do not pay them and it is oxymoron to call them both mercenaries and idealists.
This documentary is a tribute to Heval Agir, a U.S. national fighting for YPG who was killed this month [July 2016] in Manbij and to the three French servicemen of our external intelligence service (DGSE) killed in Libya over Benghazi this month too. War against ISIS is not only about Syria.