The 25-year-old died after authorities say he bombed a Palm Springs fertility clinic. Experts warn that online nihilism is fueling similar violence in the US and Europe.

As a child, Guy Edward Bartkus enjoyed playing with smoke bombs and model rockets, and once managed to burn down his family home with a box of matches.

Sitting here with my kids, knowing that this guy was 50 feet away — a bomb of that magnitude could have destroyed our house… was pretty insane,” a neighbor said.

Bartkus is believed to be the person who detonated a bomb at the Palm Springs American Reproductive Center, which offers services like IVF, because he was aligned with the pro-mortalist and anti-natalist movements—the idea that humans should not continue to procreate.

One national security expert told NewsNation that Bartkus’ philosophy is one of the strangest domestic terrorist movements he’s ever seen. The suspect apparently described himself as pro-mortalist, a fringe belief that includes a desire to die as soon as possible in order to prevent further suffering.

A 25-year-old man suspected of terrorism in a deadly explosion at a California fertility clinic reportedly had a website which referenced Satan and expresses hostility toward Christians and pro-life

The suspected bomber of a California fertility clinic appears to have declared “war against pro-lifers” in a smattering of online