A lot of trendy ideas have come out of the internet, but I don't think any of them have achieved the religious status of "fuckcars" (aka walkable neighborhoods).
Its not that the ideas are bad or wholly wrong, but their is a sizeable contingent of followers who believe that walkable living is a silver bullet that fixes everything. Everything.
So to someone who happens to fall into contact with an evangelist, they sit and listen for a few minutes, and then come away like they just learned who the real God is. Any societal or personal illness you can think of, the Church of Fuckcars has a confident and surface level "makes sense" answer.