sorta---and we do know. Jesus was protesting theWe'll never know for sure but I think Jesus was protesting the selling of animals for sacrifice in the Temple and the corruption it brought.
business venture people in the temple court yard
and the roman involvement with them. Money
changing, itself, was necessary since people with
foreign coin came to Jerusalem during passover--
it was a pilgrimage holiday. The idea that Jesus
objected to animal sacrifice (as if he was a
vegetarian) is silly.