My suspicion is that the world is in such peril now (overpopulation, climate degradation, inflation) that people prone to depression are just giving up/saying ''what tha fuck?'' and giving in to their primitive instincts.

“Eclipse released a statement saying it was "deeply saddened" by the events and its "thoughts are with the victims and their families".”. No prayers.
I think the pressures of everyday life are worsening, due to the ultra-conservatives.

In half of all murders the victim or perpetrator was legally drunk, so alcohol plays a big role.