Then let's vet this article.
Straight from the horse's mouth, from "Full text of Pope Francis' address to the Diplomatic Corps", courtesy of Vatican Radio:
"...The personal dimension of rejection is inevitably accompanied by a social dimension, a culture of rejection which severs the deepest and most authentic human bonds, leading to the breakdown of society and spawning violence and death. We see painful evidence of this in the events reported daily in the news, not least the tragic slayings which took place in Paris a few days ago. Other people “are no longer regarded as beings of equal dignity, as brothers or sisters sharing a common humanity, but rather as objects” (Message for the 2015 World Day of Peace, 8 December 2014, 4). Losing their freedom, people become enslaved, whether to the latest fads, or to power, money, or even deviant forms of religion..."
"...The Middle East is tragically embroiled in other conflicts which have lasted far too long, with chilling repercussions, due also to the spread of fundamentalist terrorism in Syria and in Iraq. This phenomenon is a consequence of the throwaway culture being applied to God. Religious fundamentalism, even before it eliminates human beings by perpetrating horrendous killings, eliminates God himself, turning him into a mere ideological pretext..."
If we are to believe Pope Francis' own words, Islamic "fundamentalism" emanates not from the fundamental tenets of Islam, but from "a culture of rejection".