@AbyssalMonkey A display for whom? What's the use of terrifying soldiers who are dead fractions of second later anyway? And no, torturing ants (which soldiers are basically are to Rimuru) doesn't make you exalted in any way, it just make you an edgelord.
For any observer on the side powerful enough to matter after this battle, this display is as significant if not more as would be the WN one, because at this level of power, a level-headed leader has to be taken as the equal of the other demon lords whereas an edgelord/child throwing a tantrum has no place in a diriging assembly.