There are dozens of photos that most of the military unit who were active at the parliament did not have magazines in their guns and often had blue training guns in their holsters or blue training pins in their assault rifles.

This is nothing you do by accident - especially not in a highly qualified military like the SK military. It is a very good way of making sure that for starters none does something stupid like kill a MP, but also to show other units (and people) that you are not really on the side of whoever commanded you to do what you do. And it mak sure you look favorable in court if things turn against you.

Considering that this was not a singular occurrence but happened amongst all types of units someone has ordered them/coordinatated this.

How high up that was? Who knows. But it was a pretty strong sign, especially towards other units.

Who knows, in theory it could also be a valid scenario that the military was “faking support” to motivate Yoon,knowing that he will be impeached after that.