That would be changing beliefs. because motivating a peace activist to action would mean motivating them to protest peace.
weakening their attitude would result in a sedentary and apathetic response. and strengthening their values would be making them even more of a pacifist. therefore you most change their beliefs before you go forth with any of the other options.
hope this helps!
There are several different reasons depending on the perspective you look at it.
If you're looking at it from the government perspective, then this was due to the fact that they wanted to get rid of the tradition and have a complete take over of the culture by getting rid of it.
Other explanations are that they wanted to switch an alphabet or genuinely wanted to simplify the actual characters.
Hope this helps!
E pluribus unum means out of many, one like a country was created out of 13 states