And the ‘other side’ created a hardcore population of diehard insurgents. For what purpose have these hardcore populations been created? To counteract each other?

Just like WWII Europe created hardcore communists and hardcore nationalists, each with their own convincing propaganda and for what purpose? To wind each other up And increase tension so much that War happened wherein Europeans by their tens of millions were duped into voluntarily entering the threshing machine of war in a mass human sacrifice.

You need to always bear in mind that there are equally zealous people being created on the other side of the debate who also consider you an existential threat and the dregs of humanity. This may be done on purpose with both sides being radicalised against the other so that they too enter the sacrifice ritual voluntarily.