To desire world peace, to want humanity united, to hope for a beautiful future, or to let justice prevail forever... Compared to such excessively luxurious wishes, killing something is actually a very simple matter.
Because life is inherently fragile.
Before reaching the legendary Fourth Stage Star Antimony, all beings are mere mortals.
No matter what kind of miraculous incarnations or Sublimators they are, once someone's throat is slit or their heart is pierced, death becomes the inevitable next occurrence.
In other words, if one could seek a solution by destroying something, it proves much simpler than creating something worthy of admiration.
Murder is just such an affair.
A shortcut, a universal solution, not necessarily the best choice, but always able to handle an emergency, allowing a terrible gaffe to be smoothed over, offering a crisp resolution to an entangled mess.
