Let's don't bring them on the table. Just like you don't bring Peoples Temple or Branch Davidians or any other cult onto the table when you talking about such topic.
I actually knew some people who was practicing Falun Gong before the crack down (And some still practicing it after). If you want to paint a portrait of those people, just image an uneducated man/woman at age around 40~50, who probably encountered some misfortunes in their life and became vulnerable enough to take anything into their head without a thought, and act upon that thought.
They're those people who would also actually believed they can receive superpower from a tinfoil hat (Well, not actually a tinfoil hat, but guess what, they have upgraded version of that [0]), meditation, or, maybe, killing themselves/others.
Oh, also, do you know the "Eastern Lightning"[1]? Don't bring them as well.
[0] https://www.flickr.com/photos/undersound/23239355 [1] https://en.wikipedia.org/wiki/Eastern_Lightning#Zhaoyuan_McD...