If we equate keyboard warriors with the people who actually commit atrocities, we're in a sense lowering the severity of those atrocities to be equal to being a sad edge lord.
Spreading ideas on the internet is spreading ideas to other meat sponges. I wouldn't consider most of the mass shooters of the past decade to be anything more than sad edge lords, but they've ended a ton of lives and ruined far more. Most skinheads are in loosely organized groups, not American History X or Sons of Anarchy with massive financial backing and tight-knit organization.
If it was true that merely being exposed to an idea had the ability to take over and control a person like a mindless puppet, then democracy would simply not work, instead the only viable option would be strict control over thoughts and communication prevent harmful ideas from taking over peoples minds.
People are very susceptible to ideas. That's the premise of political propaganda and the entire advertising industry. It's not clear what the solution is but most people are consumers of ideas, not producers.
If we equate keyboard warriors with the people who actually commit atrocities, we're in a sense lowering the severity of those atrocities to be equal to being a sad edge lord.