Evangelist...Really?

This headline of this article says Thoreau was a tiny 🏠 evangelist.

https://www.washingtonpost.com/lifestyle/home/lessons-from-the-first-tiny-house-evangelist-henry-david-thoreau/2017/03/13/3dddc69e-02d0-11e7-b1e9-a05d3c21f7cf_story.html?utm_term=.8da8f43bc0dc