Spiritually speaking if mediums and physics are meant to be killed?

It's spelled "psychic," not "physic." Physics is a scientific study of matter, energy, and force.

And presumably they are not Christian, since as you pointed out it is very much against the Bible. Either they don't know their Bible when they claim to be Christian, or they are intentionally lying in hopes of misleading Christians to spend money on them. If, however, you are referring to prophets, they got their information from God. Psychics do not.

There is a difference between mediums/psychics and prophets.

You mean psychics - not physics. There's a huge difference!

first off that is old Testament law we are no longer to kill them but love them enough to teach them they are relying on the devil for advice instead of God the new law is grace and love we were lead to Christ by the Old Testament while the practice is evil to be one of these true Christians teach against such behavior

Who knows? who knows who really wrote these books in the first place? Difficult one.

Smalls and biology.