He evidently couldn't forgive mankind without killing His own son
God didn't kill His Son. Our sins did. Truly, the greatest gift of all. And what did that accomplish for you? Are you grateful? Or are you acting self-righteous and putting parameters around our Heavenly Father - so YOU CAN UNDERSTAND THINGS?
NIV 1 Peter 1:17-21
17. Since you call on a Father who judges each man's work impartially, live your lives as strangers here in reverent fear.
18. For you know that it was not with perishable things such as silver or gold that you were redeemed from the empty way of life handed down to you from your forefathers,
19. but with the precious blood of Christ, a lamb without blemish or defect.
20. He was chosen before the creation of the world, but was revealed in these last times for your sake.
21. Through him you believe in God, who raised him from the dead and glorified him, and so your faith and hope are in God.
NIV 1 Corinthians 2:7
No, we speak of God's secret wisdom, a wisdom that has been hidden and that God destined for our glory before time began.
NIV 2 Timothy 1:8-10
8. So do not be ashamed to testify about our Lord, or ashamed of me his prisoner. But join with me in suffering for the gospel, by the power of God,
9. who has saved us and called us to a holy life--not because of anything we have done but because of his own purpose and grace. This grace was given us in Christ Jesus before the beginning of time,
10. but it has now been revealed through the appearing of our Savior, Christ Jesus, who has destroyed death and has brought life and immortality to light through the gospel.
NIV Titus 1:1-4
1. Paul, a servant of God and an apostle of Jesus Christ for the faith of God's elect and the knowledge of the truth that leads to godliness--
2. a faith and knowledge resting on the hope of eternal life, which God, who does not lie, promised before the beginning of time,
3. and at his appointed season he brought his word to light through the preaching entrusted to me by the command of God our Savior,
4. To Titus, my true son in our common faith: Grace and peace from God the Father and Christ Jesus our Savior.
Jesus willing went to the cross to die for our sins in obedience to The Father so we can have eternal life with Him.