God would forgive all people if they admit they were wrong and show penitence without effusing His son's blood
I believe we all have sinned. The penalty of sin is death. Jesus paid the penalty, he died. Hebrews 9:22 says that without the spilling of blood no one can be forgiven. If one believes the Old Testament is God's Word, Isaiah 53 seems to foretell and describe in great detail Christ's death and why he died:
4 He suffered the things we should have suffered.
He took on himself the pain that should have been ours.
But we thought God was punishing him.
We thought God was wounding him and making him suffer.
5 But the servant was pierced because we had sinned.
He was crushed because we had done what was evil.
He was punished to make us whole again.
His wounds have healed us.
6 All of us are like sheep. We have wandered away from God.
All of us have turned to our own way.
And the Lord has placed on his servant
the sins of all of us.
7 He was beaten down and made to suffer.
But he didn't open his mouth.
He was led away like a sheep to be killed.
Lambs are silent while their wool is being cut off.
In the same way, he didn't open his mouth.
8 He was arrested and sentenced to death.
Then he was taken away.
He was cut off from this life.
He was punished for the sins of my people.
Who among those who were living at that time
could have understood those things?
9 He was given a grave with those who were evil.
But his body was buried in the tomb of a rich man.
He was killed even though he hadn't harmed anyone.
And he had never lied to anyone.
10 The Lord says, "It was my plan to crush him
and cause him to suffer.
I made his life a guilt offering to pay for sin.
But he will see all of his children after him.
In fact, he will continue to live.
My plan will be brought about through him.
11 After he suffers, he will see the light that leads to life.
And he will be satisfied.
My godly servant will make many people godly
because of what he will accomplish.
He will be punished for their sins.
12 So I will give him a place of honor among those who are great.
He will be rewarded just like others who win the battle.
That is because he was willing to give his life as a sacrifice.
He was counted among those who had committed crimes.
He took the sins of many people on himself.
And he gave his life for those who had done what is wrong."