This is what I'm going to say:
Listen guys, one month I had some bible thumpers knocking at me door telling me about hell. Then I have some weird fundamental religious sponsored "education books for parents to help their children in school". The next I have some south Korean mother god cult come to my door with QR codes on their literature too. First thing I did was google them to find out about them and turns out they are a cult. First thing I'm going to do is google your group and I'd bet good money you're a cult too. Because only Cults recruit. Religions that actually offer something to people don't have to, the people come to them.
Then I'll try to engage them into a discussion about whether they can hold different opinions from whatever their literature says. Because If not, they how is their religion different from say, North Korea? BAM!