[Mark17]

Horrible news. Why would someone do this?

I do not know, but I wonder if the killer has any particular religious preference?

[Greysard]

I wonder if the killer has any particular religious preference?

Reportedly, the shooter was driven by hatred for Orthodox Christians, aggravated by prolonged depression, according to Google Translate.

Additionally the article mentions that the shooter developed interest in some neo-pagan religion, "whose supporters tend to aggressive attitude to believers who profess other religious beliefs."

Here is a summer time photo of the Holy Resurrection Cathedral in Yuzhno-Sakhalinsk (from an earlier article on that site:)