Religion is not a screen but fundamental to the problem.
It goes back much further than Islam. The problem lies with all the Abrahamic faiths which are firmly based in the glorification of bigotry, murder and genocide. Anyone who has read the books and dares to acknowledge what is written there in blank and white should be able to confirm this. The command to murder in the name of God clear.
How so ever the religious and their apologists try to twist the meaning there can be no denying that the behaviour by those in IS is conspicuously modeled in the likes of Joshua and his band of Hebrews who brutally slaughtered hundreds of thousands of people in the name of their God.
While the so called moderates of the Abrahamic religions continue to uphold the books as the Word of their God, by whatever name, they continue to give implicit support to those who follow the texts more closely than they do.
Only when moderates denounce the entire concept of so called prophets relaying the word of God to the Holy books will we be able to relegate the actions of IS and their kind to being pure psychopathic violence by a relatively small number of nutters.
Even Christians, despite the message of love and peace continue to give credence to those who use violence to glorify God.
The bottom line is every Abrahamic sect gleefully anticipates the day when their God slaughters all who do not bow down to Him. This includes Christians so their message of peace is really nothing more than a thin veil of respectability over a fundamentally pathological philosophy.
We must stand up and denounce these stone age attitudes wherever we find them. Tell the world that we do not accept the notion of prophets, any prophets, or the books that supposedly tell of God's intentions.
Such beliefs are dangerous nonsense and certainly not worthy of our respect.