tl;dr = The parliament wants to change a constitution law relating to governor election, people smell blood.
The constitutional court changed the election requirement for governor positions, one is the number of seats on the parliament that is needed to put forward a candidate and an age requirement of 30 years old.
The outcry happens when the parliament tried to put forth their own constitutional changes, and the one that is very noticeable is on the age requirement. Requiring the governor-elect to be 30 on the inauguration. So if you are under 30 on election day, you can run in the election. I think this part is the one that angers ID.
Now why is there huge outcry? The current president has reached his term limit, and last year he have done some fuckery in the constitutional court, changing the requirements to become a vice president. His son who have ever held one position in government won the position of vice president-elect.
This year there will be a governor election in the tail end of this year. The people senses a deja-vu when parliament tried to put forth their changes. And it all lines up, the president other son, is currently 29 years old, and if the changes passes through, he would be able to run, think it's going to be a vice governor position. Because he would turn 30 on inauguration date.