This is most likely just my true nature but upon realizing who was behind that door that was being ganged up by these Dark World denizens, my mind just stopped thinking and my vision somehow darkened a bit.
I didn't notice this back then but this is also probably what happened when I heard about Fleur getting ambushed. It led me to massacre a whole encampment which… if I think about it logically, it has minimal gains that didn't even affect the next battle and more importantly, it lost me a bit of a time.
And the same thing is happening right now, the Swordforce-covered Willful Sword has now been dyed red as I started to kill everyone I passed by, whether if they're injured or not.