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People were selling animals for sacrifice.
As they were selling animals, and trading money.
Well, they were not selling them in the Temple, they were selling them in an outer courtyard. Until it was destroyed, the Temple was a center where Jews brought animal sacrifices. The Torah, when it commands the sacrifices, says that you could bring your own animal, but if the distance was far, you could "turn your animal into money", then travel and buy an animal in Jerusalem to sacrifice. So, from the start, there was a livestock market at the Temple where animals could be purchased to sacrifice. The rules for sacrificial animals were fairly strict: The animals had to be without blemish. So, the market was under priestly supervision to assure that the animals sold there met the requirement.
Usually people who need the meat, or people who need the money they can get from selling the poached animals. Or sometimes for the thrill of it.
By farming, raising animals and selling them.
it shold never, selling any animals sould be illegal its self
The temple was used for selling and buying. And this act angered Jesus according to the bible.
lost temple
Actually the people were buying and selling animals for sacrifices in the temple. Jesus drove them out of the temple.John 2:15,16 When He had made a whip of cords, He drove them all out of the temple, with the sheep and the oxen, and poured out the changers' money and overturned the tables. And He said to those who sold doves, "Take these things away! Do not make My Father's house a house of merchandise!"
Usually poor people who either need the meat, or the money they can get from selling the animal on. Sometimes people go poaching just for the thrill of it.
In the Temple in Jerusalem.
Jesus drove out those selling cattle and sheep...