Yes. This is a cult indoctrination tactic that the Mormons use too. The gist of it is that once you have people sufficiently bought-in that they’re unlikely to just go rogue, you send them out into a world generally hostile to them. If they manage to get converts, great, but the main point is to teach the initiates that “everyone out there hates you, the cult is your only family. We love you. We support you. There’s nothing for you out there.”

When Mormons and JWs used to come to our door when I was growing up we’d invite them in for some water, let them sit down for a bit, and let them know emphatically we’re not interested in their religion but they can chill for a while. As satisfying as it is, meeting them with open hostility just makes the cult tactics more effective.