All you have to do is read about some of the sects in the world (not just those that claim some tie to Christianity) and you know that people will believe all kinds of ridiculous nonsense.
How about the islamic parents who kill their children because they bring "shame" on the family? Or the westboro whackos who protest military funerals?
Since time began people have been doing all manner of horrific, disgusting things that they have tried to justify through religion. Need another example? Look at the murdering fool on trial right now for mowing down his brothers and sisters in the armed forces.
That they may be willing to talk about it publicly with other "like-minded" fools tends only to reveal the depth of the fool, perhaps.