Well, I would tend to disagree...in that
there is nothing inherently evil or even contrary to Christianity (or any other belief) in the Tarot.
Let's say that we live simultaneously in two distinct universes: The Physical Universe, and the Spiritual Universe.
The physical universe consists of energy, space, matter, and time; it is your keyboard; the body you use to type with; cars, yo-yo's and sandwiches. Stuff like that.
The Spritual Universe is that which some people don't even believe in...but it is the aspect of our life which includes God (if you are inclined to believe, some don't) and our connection to God, and to each other on this spiritual level. This is where you get the phenomena of ESP, psychic ability, etc. All that's happening there is that somebody has a greater ACCESS to this spiriual universe, and can "peek" at this interconnection.
Since the spiritual universe, for example, does not contain the element of TIME, then it can be safely said that everything happens at once. What will happen has already happened. Thus, you can have people telling the future, or reading mysterious past occurances. They're just looking at this "record".
Now say you've got this person who has a bit of this (psychic) ability, and you give him/her a Tarot deck, and teach him/her in its use; what you have done is given this person
an additional tool to bridge the two universes. And that's all it is. Just a tool!
It's all a neutral thing...what matters is
what we DO with it.... I can understand perfectly well the most devout Christian doing Tarot readings, as well as a Satan worshipper.
I think the concept that the Tarot, or other such tools are anti-Christian, supposedly "evil", etc. is simply because they don't feature anywhere in the Christian orthodoxy. They're just not familiar. And so become 'suspect' to these folks.
Just my .02.