San Diego Mosque Shooters Radicalized Online, FBI Says

The FBI pieced together a dark picture. Both shooters spent months in online forums and encrypted chat groups where extremist content flourished, fed by algorithms that kept pushing them toward increasingly radical material. You've probably seen the warnings before about how the internet can trap people in these echo chambers, but this case shows exactly how that happens at scale and with real consequences.

When agents raided their homes, they found weapons inscribed with a three-word message of hatred. Both men wore Nazi insignia. Their phones and laptops contained thousands of messages glorifying violence and targeting religious minorities. The digital trail didn't just show casual interest—it showed sustained engagement with content designed to dehumanize specific groups.

What makes this harder to stomach is that these platforms knew what was happening. The tools exist to catch this stuff earlier. Content moderation systems could flag radicalization patterns. But enforcement remains spotty, and the worst material often migrates to smaller, less-monitored platforms where it grows unchecked. The shooters didn't radicalize in a vacuum—they radicalized in plain sight.