There is nothing evil about Reiki that I am aware of. IMO, most folks who are critical of it really don’t know that much about it. Many practitioners of it believe their healing power comes from God. Now if they claim it comes from somewhere else then there might be a reason to be concerned.
BTW, in the post where the relative was forced to leave the room, I agree, that was wrong.
Here is web site that might help clarify it, at least from a Christian point of view.
Many nursing schools and hospitals are starting to conduct reiki classes. The Govt’s alternative medicine center has started studies on Reiki.
My wife is a nurse and a Reiki master herself and there is nothing evil about her. While I don’t fully understand it myself, I don’t think “evil” is in the equation.
BTW, nobody conjures up any spirits as far as I know.
Try not to fall into the trap of “It’s different, I don’t understand it, so it must be bad”. I tend to fall into that trap myself at times.
You’ll find, most here on this board are naysayers about Reiki. This is their opinion and they are welcome to it.
Bottom line: If you don’t approve, then stay away from it.