system
A chat on subreddit /r/NoStupidQuestions
human
You would see the near death of the community and small town church. 

For every megachurch with a Corvette driving pastor, there are hundreds of small churches that can't afford to fix their roof. 

Most people who post this tend to associate religion with Republican politics (because of the corvette driving megachurch pastors) but this isn't really true. 

How does this affect the country. The small churches in black communities are where the civil rights movement began and rather often where the real work of social activism happens (sorry college liberals). Those parishioners are the boots on the street in the poorest communities advocating change. Yes, they are political activists, very much so, and yes, they should be allowed to do as they have been doing for decades. 

When you start taxing churches, the MAGAchurches will do just fine, they make millions, they can afford to pay, but you'll kill the very churches were people like MLK got their start.
gpt
This...as much as I dislike the "church", we haven't yet replaced the community aspect.