This was a Critical Mass event, which is why the bicyclists are taking up all of the street as a way to reclaim the streets and protest the lack of safety for riders under usual conditions. It’s not legal, but protests are never useful if they’re fully legal now, are they.
It’s a metaphor
A poor one that makes a ton of assumptions about my character and what I would do during Nazi Germany all because I said that this isn’t an effective way to gain supporters… Really?