I think most people would be comfortable with that being called a Christian denomination.
Most rich people, sure! The salient question is, would evangelicals be comfortable with it? Would Protestants be comfortable with it? I don't think so, because neither has ever included 'healing, deliverance, and prosperity for the whole man: spirit, soul, and body' in their historic statements of faith. Prosperity teaching has been highly controversial, and condemned by evangelicals and many besides, including Catholics, as a modern perversion.
Sounds to me like you are saying that because there are denominations there is no such thing as Christianity. Which, while I essentially agree with it, simply adds unnecessary complication to most discourse.
Theologians do not take them seriously
Theologians don't seem to take a lot of lay-beliefs seriously. I'm not sure what that has to do with whether the label 'Christian' or 'evangelical' is an appropriate one.
If these are their beliefs, they are firmly opposed to evangelicalism and Protestantism. With their brain-washing, they are indeed a social menace, and their political inspiration is what needs investigation, because they are incompetents in theology.
Whatever you want to call them, it seems that they are one (extreme) example of the kind of thing under discussion (ie., converting children using fear as a tactic).