When you say sacrifice, Allah wanted to check whether Abraham could sacrifice something which was very dear to check his feeling. In agro society cattle was necxt important. Today when you buy a goat from market do you emulate the same value of sacrifice? WOuld you have the guts to sacrifice something very dear to you? That was the essence of the teaching. Today Bakrid is about trading goats which are not dear to anyone, there is no feelign of sacrifice.
