I vaguely remember a story a few years ago about a guy receiving a blow to the head from a bike lock and requiring therapy for potential brain damage from said blow.
Let's be clear, that sucks, but it's nowhere near the radicalization we've seen on the right. Boogaloos shooting cops, neo-nazis responsible for numerous synagogue / church / mosque shootings, driving cars into crowds, etc. aren't really comparable to a bike lock to the head.