Yes.
And murder can be a lot of things. It can be part of some kind of escalation of a conflict, a cold blooded hit for money, someone desperate to hide a secret, someone losing their temper. Those are the more common kinds of murder and they have motives we can kind of understand, even if they are evil.
In this case it's basically a crazy person from a psycho film, or at least that's how people feel about it, and the cat killer bit is the thing that demonstrates that. Most people don't understand this motivation at all, it seems alien and even demonic. So it gets a lot of attention.