Its because the political right has lost the millennial generation (the majority of them anyway) who are fundamentally opposed to the ideology of the right. As a result the right are in demographic decline and will lose their premier position in society. So they have cast around for someone to blame (it can't be the epic failure of their ideology of course!) and the scapegoat they have found is the education system. Yes, its all those damn liberuuls infesting the education system who are indoctrinating the young. It then spread from there so just about anything the right disagree with is the fault of SJW's.