The lawsuit seeks changes to the changes companies’ safety standards, with the plaintiffs calling the platforms “defective and unreasonably dangerous.”
“By his own admission, Gendron, a vulnerable teenager, was not racist until he became addicted to social media apps and was lured, unsuspectingly, into a psychological vortex by defective social media applications designed, marketed, and pushed out by Social Media Defendants, and fed a steady stream of racist and white supremacist propaganda and falsehoods by some of those same Defendants’ products,” the lawsuit reads.
I'd say it is at least partially social media's fault.
There are so many other stories of social media radicalizing people. It was a huge issue at the height of ISIS' power. I'm not saying all social media is bad or it will turn everyone into killers, but I'm not sure why you don't think the social pressures inherent in any system involving a community of people won't have an influence.