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In the middle ages bigots made suspect groups swear special oaths since it was 'known' they would lie:
"The Jew shall stand on a sow's skin and the five books of Master Moses shall lie before him, and his right hand up to the wrist shall lie on the book and he shall repeat after him who administers the oath of the Jews:
Regarding such property of which the man accuses you, you know nothing of it nor do you have it. You never had it in your possession, you do not have it in any of your chests, you have not buried it in the earth, nor locked it with locks, so help you God who created heaven and earth, valley and hill, woods, trees, and grass, and so help you the law which God himself created and wrote with His own hand and gave Moses on Sinai's mount. And so help you the five books of Moses that you may nevermore enjoy a bite without soiling yourself all over as did the King of Babylon.
And may that sulphur and pitch flow down upon your neck that flowed over Sodom and Gomorrah, and the same pitch that flowed over Babylon flow over you, but two hundred times more, and may the earth envelope and swallow you up as it did Dathan and Abiram. And may your dust never join other dust, and your earth never join other earth in the bosom of Master Abraham if what you say is not true and right. [This refers either to a decent burial or to resurrection.] And so help you Adonai you have sworn the truth.
If not, may you become as leprous as Naaman and Gehazi, and may the calamity strike you that the Israelite people escaped as they journeyed forth from Egypt's land. And may a bleeding and a flowing come forth from you and never cease, as your people wished upon themselves when they condemned God, Jesus Christ, among themselves, and tortured Him and said [Matthew 27:25]: "His blood be upon us and our children." It is true, so help you God who appeared to Moses in a burning bush which yet remained unconsumed. It is true by the oath that you have sworn, by the soul which you bring on the Day of Judgment before the Court, [before the God of] Abraham, Isaac, and Jacob. It is true, so help you God and the oath you have sworn [Amen]."
ASSASSIN n. 1. a murderer, esp. one who carries out a plot to kill a public official or other prominent person. 2. assassin. a member of a secret order of moslem fanatics who terrorized and killed christian crusaders. [french < medieval latin. assassinus < arabic hashshashin, user of hashish , hashish, hashish.]
does any of this sound familiar? they've been doing this for centuries, killing public officials, and using drugged assassins, such as in chechnya, where the school kids were murdered.