Ummm.... I looked up Galatians 5:19 and maybe they were quoting from another version of the bible, but the one i read from said "Now, you know the works of the flesh. They are: sexual sin, uncleanness, wild living" I'm not entirely sure what they mean by that, "5:20 - worshipping of idols, witchcraft," which, yes some witches practice tarot but not all and if you do it does not make you Wiccan or witch,"hate, wrangling, jealousy, anger, selfishness, quadreling, divisions, envy, drunkenness, carousing, and the like."
So, just to be clear the definition of spiritualism is "A system of belief or religious practice based on supposed communication with the spirits of the dead, especially through mediums."
Tarot cards are not used to communicate with the dead. Some see them as a card game, others use them to tell the future or get more insight into the past or present. Therefore, tarot cards, according to Galatians 5:19-20 in The Bible, are not "against the rules".
I hope that answers your question.