Punishing liars and rebels by giving them lies they want to hear while telling them ahead of time they are being lied to is not immoral. Sending babies to hell for no reason is immoral. God rebuked that sort of foolishness in Ezekiel 18, when He said, "As I live you shall no longer be allowed to say something so stupid." (In modern English.)I'm curious; What do you do with the following scripture....
I Kings 22:19 Then Micaiah said, “Therefore hear the word of the Lord: I saw the Lord sitting on His throne, and all the host of heaven standing by, on His right hand and on His left. 20 And the Lord said, ‘Who will persuade Ahab to go up, that he may fall at Ramoth Gilead?’ So one spoke in this manner, and another spoke in that manner. 21 Then a spirit came forward and stood before the Lord, and said, ‘I will persuade him.’ 22 The Lord said to him, ‘In what way?’ So he said, ‘I will go out and be a lying spirit in the mouth of all his prophets.’ And the Lord said, ‘You shall persuade him, and also prevail. Go out and do so.’ 23 Therefore look! The Lord has put a lying spirit in the mouth of all these prophets of yours, and the Lord has declared disaster against you.”Was the lying spirit doing something immoral in your view?
And there are a great many theologians that would disagree with you. They teach that what is right (i.e. moral) is so because God declared it so and that God is free to do anything whatsoever and that it would be righteous by virtue of the fact that it was God doing it. So, if God wants to send babies to an eternal Hell as punishment for simply existing in His universe then the baby's torment is justice, not because it is actually just by any definition we understand or can articulate but because it was God who inflicted it.
Such doctrines (i.e. Augustinianism (Catholicism, Calvinism, et al.)) render the terms "moral" and "righteous" meaningless and make a mockery of justice and we can know on that basis alone that all such doctrines are false but that doesn't change the fact that millions upon millions of Christians believe it and teach it to others and are able to quote the bible as easily as you and I do. This happens because people get the cart before the horse by permitting philosophy to inform their theology proper (i.e. doctrines concerning who God is) when it aught to be the other way around. If God did not exist as the rational person that He is, philosophy could not exist. Indeed, God is not merely the presupositional basis of philosophy and of all rational thought, He is Reason itself (John 1:1-14).