A church is not a building. It's a bunch of people who've gathered together for mutual support through faith in Christ.
Therefore, any act of religion that I make is a personal act of religion, so to take even a dime of my act of religious giving, is to curtail my act of worship. That makes my religion "curtailed." If something is "curtailed," it is not "free."
If I block the stream behind my house, it is "curtailed," it is no longer "free" flowing.
That's correct. I said the 1st applies to everyone, regardless of whether, or not, they're a church member.