Tomorrow is not a place tomorrow is mostly a time
They wanted to celebrate the sacrifices of the soldiers who made the land sacred ( Martyrs)
By their death made the land sacred
The answer is Agression , and violence.
The main difference between the two acts is not in the actions per se, but in Agression, the perpetrator may not really intended to harm others because his/her actions derived from their personal egos in order to appear as capable in order to increase their value. In violence on the other hands, the perpetrators tend to have a big intention to cause harms to their target.