This is really sad. And it happened in Kraków, of all cities. I can't wait for my right-wing colleagues and family members be like: "But left-wing terrorists also killed people... in the 70s! So we need to be afraid of them! This guy was just an exception, probably mentally ill..."
Don't know about Poland, but in Germany, criminal acts by the right wing outnumber those by the left wing by more than 3:1. Also, left wing terrorists target... right wingers, and the owning class and its henchmen. Right wing terrorists tend to target immigrants, but also completely white-bread average people, like in this case.

I'm sure he's just a lone wolf and (far) right doesn't have anything to do with it /s (imagine if he was a Muslim...)

In other news, Pope held Catholic views

Kierwiński’s characterization, however, appears to contradict what is believed to be the suspect’s social media profile, which points in the opposite direction regarding his ideological affiliation.

One photograph shows Oksiński posing with an LGBT Pride flag while wearing a gas mask and a military-style beret. Other screenshots from his apparent Facebook account show him mocking Christianity and Pope John Paul II, including a photo featuring the late pontiff and a bottle of beer. In another exchange, he jokingly responded to a comment comparing the red lighting in a photograph to communism by calling it a ‘subliminal message’.