Why did God want to KILL
Question: God called Moses, in Midian, to lead his people out of Egyptian bondage. Sometime later, however, the Eternal pursued him to KILL him and only the circumcising of his son by his wife Zipporah spared his life. How can God first call Moses for a special task then later want to kill him?
Answer: While the Bible does not precisely state all of God's reasons and motives for doing something, we can take what information is available and derive possible explanations. Although it may seem outwardly there was nothing wrong, to God nothing is hidden! The issue surrounds the circumcision of a son. I will speculate as to why it was not done at the proper time, on the eighth day after birth, as God commanded.
The Bible states that while Moses was in Midian he was told to go back to Egypt (Exodus 4:19). He soon travels to Egypt with his wife and sons. Exodus states that during the journey 'the Lord met Moses and tried to kill him.' It is then that Zipporah, his wife, did something seemingly odd.
The Lord then allowed him to live (verse 26).
Because only one of his sons is mentioned here - not having been circumcised, we must assume the other was! Evidence suggests that Moses did circumcise his firstborn according to the command of God. Was Zipporah (not being an Israelite) so appalled at the bloody act that she gave her husband a hard time over it --- such that he didn't want to do it again? God knew about the situation and gave him time to repent. Moses may have hoped the problem would be forgotten and go away.
Circumcision on the eighth day after birth was part of the covenant between Abraham and God (Genesis 17:10 - 14). This act became part of the agreement between God and Israel. Every male child had to be circumcised or else 'that person shall be cut off from his people' (Genesis 17:14).