I see your approach as reasonable in situations in which the threat is directly from that person or, maybe, if there is a pathway to use those methods to achieve a larger scale victory at some point.
Your mention of what churches do (and any group of like-minded people could do) is what I would usually call shunning, but I think they are about the same thing as what you said.
Each person has a different sense of what is a threat. Putting aside my unusual example of somebody running over your foot with a car, I might have more tolerance (or stubbornness) of talking with people to reach an understanding. If a person does not have the time, or patience, or skills to do that, then other options look better.
Given my background and what I know/believe about the psychological barriers to attitude change, I'll continue to try the talking approach... as long as I have the time and patience.
thx
This libertarian, having been at it since 1976, is about as "talked to death" as one can imagine. So when I come in contact with someone I perceive to show some hope (not locked into his "9 dots"), I simply work the "Do you own your own life?" angle first. If I get a resounding yes, or even "I think so...", I drive him over to "Adam Kokesh Avenue" and show him the "Freedom!" book. I tell him to finish it (or the audio file) and we'll discuss it further afterwards. Straightest path between the two points; stay away from Mt. Fuji and lots of mulberry bushes.