To the contrary. I have stated many times that fighters are also compelled by circumstance to join extremist movements in Yemen, Palastine, Afganistan, Iraq, Syria etc to commit or support committing of war crimes.

If you are a young orphan boy in Sudan, you basically have 2 choices to survive. Become an immigrant in another country or join the life of violence and become a pirate, gang member or religious extremist.

Its the plight of the downtrodden in all countries with significant wealth inequality. So long a power is concentrated in Presidents, Mullahs, Priests, dictators and oligarchs, they will get the downtrodden to commit crimes on their behalf.

Very few conflicts are just and even fewer remain so after enough time.