This is real sad, now the root cause!!! Its extremism for power . Religion doesnt promote any of this. This is a manipulation of human mind..
If someone ask u question like why r u in the world? What happens after death . A fear gets to most people. This is a great entry point for the extremist. The only solution is education and integration to the society
Checkout my blog on education .. i hope free online education and good resources keep people mind open https://steemit.com/education/@sanees/us-education-system