Just give them housing, healthcare, food, and most importantly a decent job and everything will be fine? The West really trying the wrong strategy.
Its been tried with Boko Haram. It even works for some. The people who make up ISIS/IS/ISIL are another thing entirely. It’s made up of several different generations. You had the original IS that piggybacked on AQI during the invasion, made up of former Sunni military/police who were dissolved. You have recruits from all over Iraq and Syria who joined over the years. A lot of the people who make up the overall group have the same feverish ideals that the MAGA crowd has, only they aren’t spoiled. They never cared what kind of peace and opportunity you had to offer they just want bodies. It’s evident in all the Iraqi civilians they beheaded, burned, starved, enslaved, etc. They will hurt you just for the sake of it because they they use fear as a weapon. It’s the tactic they used to bum rush Iraq after the US pulled out. They waited, trained, and recruited in Syria then they used brutality and human waves to make the local forces run away. Then they raped, burned, and pillaged all the localities they captured. Their reputation and ferocity got them victories.