Bored US teens kill visiting Australian man

We have systems in place to take care of criminals with mental health
issues. Why would I need to get involved?

What exactly is people’s issue with this? Does it make more sense to you
for a couple of kids to be perfectly normal but kill people when bored?
Cause that makes sense doesn’t it. I know I considered murdering tourists
as a boy when I got restless, nothing odd about that right? Just normal bad
behaviour, darned kids!

Or does it provide some comfort to be able to dismiss them as demons,
rather than accept that there’s clearly not something right in their heads?

Is it because ultimately you want to dismiss them entirely, destroy them,
and it’s easier to imagine that there’s absolutely no root cause to this
event? That its completely random and the result of a bad attitude?

Please elaborate.