It is the first step on the ladder of liberalism. It has been the way since education was 'invented'.
Teach them what you want to say, such as death to all blond people, or (our) God is best, or only right handed people are intelligent, whatever your 'propaganda' of the day is and eventually the old dinosaurs that don't agree die off.
The problem is of course that eventually new propaganda comes along so it starts all over again. Or it just never stops. It is an inevitable treadmill of vanity projects by the people indoctrinated by the previously indoctrinated.