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The Talmud is very complicated, not every statement is a law, sometimes it is a commentary or the opinion of a certain Rabbi, sometimes a stipulation or refutation, however the quotes below should give you a good idea about Talmudic reasoning on certain issues.
According to the Talmud, one is not supposed to learn paganism unless they are studying it to refute it. Wizards, necromancers, people with familiar spirits, those who learn the ways of magicians and sorceresses are to be killed.
Stone Wiz ards To Death
“Their blood shall be upon them is stated here, and also in the case of one who has a familiar spirit or is a wizard: just as there the reference is to stoning, so it is here too. “-Babylonian Talmud: Tractate Sanhedrin, 54a
Stone Wizards / Necromancers
“You say, by stoning; but perhaps it means by one of the other deaths decreed in the Torah? — The Writ saith here, their blood shall be upon them; and in the case of a necromancer or a wizard, the Writ saith likewise, their blood shall be upon them just as there, stoning is meant, so here too.” - Babylonian Talmud: Tractate Sanhedrin, 54a
FOOTNOTE 4: Lev. XX, 27. A man also or a woman that hath a familiar spirit (i.e., a necromancer), or that is a wizard, shall surely be put to death: they shall stone them with stones, their blood shall be upon them.
Stone People With Familiar Spirits To Death
“Here it is written, his blood shall be upon him; and elsewhere it is written, [A man also or a woman that hath a familiar spirit, or that is a wizard, shall surely be put to death; they shall stone them with stones:] their blood shall be upon them:  just as there stoning is meant, so here too.” - Babylonian Talmud, Sanhedrin 66a
FOOTNOTE 17: Lev. XX, 27. - “‘A man or woman who is a medium or spiritist among you must be put to death. You are to stone them; their blood will be on their own heads.’”
Jews Who Learn From Magicians Should Be Killed Unless They Are Learning To “Understand And Instruct”
“As to magianism, Rab and Samuel [differ thereon]: one maintains that it is sorcery; the other, blasphemy. It may be proved that it is Rab who maintains that it is blasphemy. For R. Zutra b. Tobiah said in Rab’s name: He who learns a single thing from a magian is worthy of death. Now should you think that it is a sorcerer, surely it is written, thou shalt not learn to do [after the abomination of those nations], [implying], but you may learn in order to understand and instruct! This proves it.” – Babylonian Talmud, Shabbath, 75a
FOOTNOTE 6: Deut. XVI I, 9. - When you enter the land the Lord your God is giving you, do not learn to imitate the detestable ways of the nations there.
Stone Sorceresses To Death
“From what has been taught: Ben ‘Azzai said, It was stated, Thou shall not suffer a sorceress to live, and it is also stated, Whosoever lieth with a beast shall surely be put to death; one subject was placed near the other to indicate that as the man who lies with a beast is to suffer the death penalty of stoning so also is a sorceress to suffer the death penalty of stoning. Said R. Judah to him: Shall we, because one subject was placed in close proximity to the other, lead out a person to be stoned? In truth [the penalty of the sorceress is derived from the following]: The necromancer and the charmer were included among the sorcerers; why then were they mentioned separately? In order that the others may be compared to them, and to tell you that as the necromancer and the charmer are subject to the death penalty of stoning, so is a sorceress also subject to the penalty of stoning.” - Babylonian Talmud, Yebamoth, 4a
Stone Sorceresses To Death
“As it has been taught; Ben ‘Azzai says: Thou shalt not suffer a sorceress to live. and it says [immediately afterwards], Whosoever lieth with a beast shall surely be put to death. The two statements were juxtaposed to tell you that just as one that lieth with a beast is put to death by stoning, so a sorceress also is put to death by stoning. Said R. Judah to him: Because the two statements are juxtaposed, are we to take this one out to be stoned? Rather [we learn it as follows]: They that divine by a ghost or a familiar spirit come under the head of sorceress. Why then were they mentioned separately? To serve as a basis for comparison: just as they that divine by a ghost or familiar spirit are to be stoned, so a sorceress is to be stoned.” - Babylonian Talmud, Berakoth 21b
FOOTNOTE 17: In Lev. XX, 27. ‘A man also … that divineth by a ghost or afamiliar spirit shall surely be put to death; they shall stone them with stones’.