Don’t bother engaging these little cults in theological debate. It’s like arguing economic theories with spam scam artists; it makes them remember you, gives them attention and never addresses what really keeps them going. I read about atruechurch a few years ago now, because topics I was googling kept turning their sites up. So, being curious who these folks were who wrote about stuff I read about, I googled them, and found out they’re a tiny group of followers of a self-proclaimed prophet/Bible scholar with no credentials at all, whose name is actually Darwin Fish (there was no product by that name when his parents chose to name him Darwin). He has been widely accused of promoting extremely cruel physical abuse of babies, kids and women, and considers his little sect the only people who can be saved. It’s more to the point to worry about what these followers are in danger of themselves, than to argue about how they see other religions.