May My Father Die Soon. - Vol. 3 Ch. 18

[alfirizkyr]

While what Asuka wanted Hotaru to understand is correct—that murder is rarely ever a real solution to a problem—she's coming at Hotaru not from a place of empathy, but a place of burden (of responsibility) and trauma (from their father). Years of treating yourself as a victim to make your suffering feel more bearable doesn't just go away, and for all we know Asuka had only learned to reintegrate with society, never really going through a proper therapy to help restructure her emotional responses.

These biases don't work with people suffering from diminished empathy like Hotaru. Hotaru's solutions are simple. Morally questionable for most people, maybe, but simple, because diminished empathy makes it harder to register and process social cues that often make human relationships much richer and more nuanced.

This is compounded also by the trauma she didn't even realize she had herself (manifesting as hallucinations), which probably forced her to form a defense mechanism similar to Asuka: whereas Asuka saw herself as a victim in all things, Hotaru saw herself as the correct one in all things. All parents who are less than perfect is bad (simple thoughts), so they should be nipped (simple solutions).

It was why she could so nonchalantly suggest killing her friend's dad, and why she could not understand that it's possible to reform a relationship even without forgiveness (like Asuka with their mom). Hotaru saw problems in simplistic ways, and simple problems can be solved by simple solutions.

 

[yatanogarasu]

Hotaru did the right thing, that subhuman bastard would've eventually reached Hotaru if she didn't kill him. He would've never changed for the better.
In a way, I think Hotaru is more mature than Asuka.