What I am saying is moreso vicarious satisfaction than Penal Substitutionary Atonement - that is God willingly bearing the punishment Himself for our sins. While I don’t deny either theory, there was a price that needed to be paid. Even the Old Testament was clear about that. Remember the spotless lamb sacrifices?

Genesis 22:8

Abraham said, “God will provide for himself the lamb for a burnt offering, my son.” So they went both of them together.

But then,

Genesis 22:13-14

And Abraham lifted up his eyes and looked, and behold, behind him was a ram, caught in a thicket by his horns. And Abraham went and took the ram and offered it up as a burnt offering instead of his son. So Abraham called the name of that place, “The Lord will provide”; as it is said to this day, “On the mount of the Lord it shall be provided.”

God provided a ram. In a substitutionary place of Isaac. But where’s the substitutionary Lamb?

John 1:29 ESV

The next day he saw Jesus coming toward him, and said, “Behold, the Lamb of God, who takes away the sin of the world!”

Romans 5:8 ESV

but God shows his love for us in that while we were still sinners, Christ died for us.

1 John 2:1-6 ESV

My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous. He is the propitiation for our sins, and not for ours only but also for the sins of the whole world. And by this we know that we have come to know him, if we keep his commandments. Whoever says “I know him” but does not keep his commandments is a liar, and the truth is not in him, but whoever keeps his word, in him truly the love of God is perfected. By this we may know that we are in him: whoever says he abides in him ought to walk in the same way in which he walked.

The Nicene Creed itself:

For our sake He suffered under Pontius Pilate. He was crucified, died, and was buried.

In fact, I find the heresy lies in the idea that Jesus didn’t die for us. God is perfectly merciful and perfectly loving, but also perfectly Just. This is where justice meets mercy.

I believe there is some element of truth to what you said- yes, it’s the same evil that starves kids in Gaza that kills Jesus.

Romans 3:10-18 ESV

as it is written: “None is righteous, no, not one; no one understands; no one seeks for God. All have turned aside; together they have become worthless; no one does good, not even one.” “Their throat is an open grave; they use their tongues to deceive.” “The venom of asps is under their lips.” “Their mouth is full of curses and bitterness.” “Their feet are swift to shed blood; in their paths are ruin and misery, and the way of peace they have not known.” “There is no fear of God before their eyes.”

The atheist commonly says “If god is real, then why doesn’t he just show himself?” Well, He did, and we killed Him.