No. Please quit evading the question. Once more: It is wrong to kill people as a sacrifice to God. Now will you answer the question?
First, Abraham is a prophet. A prophet can have a way of establishing a more direct and unambiguous communication with God. We have no way to identify how unambiguous Abraham receive messages from God. We can't just apply our lack of communication to God in the case of Abraham.
Second, God asks Abraham to kill his son for many reasons. At that time the Canaanite were practising children sacrifice. So if Canaanites had the faith to their idol gods God would like to see that Abraham has more faith in the true God. He later stopped Abraham for the message that children sacrifice is not what He wanted. That's why children sacrifice is never a Jewish practice since Abraham. However it is a rather common practice of other Canaanites.
Third, God actually hints that the sacrifice of the son of the father of all Jews doesn't help anything, only the sacrifice of God's own Son can bring us salvation. Thus all the sacred rites practised by the Jews are actually for the preparation of the coming of Jesus Christ.
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