If God wanted to forgive humanity,why did he allow his enemies to kill his son? What mistake did Jesus made to be sacrifised?

Jesus had some issues too .

Although God banished Adam and Eve from the garden, He didn’t leave them without hope of reconciliation. He promised He would send a Savior to defeat the serpent (Genesis 3:15). Until then, men would sacrifice innocent lambs, showing their repentance from sin and faith in the future Sacrifice from God who would bear their penalty. God reaffirmed His promise of the Sacrifice with men such as Abraham and Moses.

Herein lies the beauty of God’s perfect plan: God Himself provided the only sacrifice (Jesus) who could atone for the sins of His people. God’s perfect Son fulfilled God’s perfect requirement of God’s perfect law. It is perfectly brilliant in its simplicity. “God made Him (Christ), who knew no sin, to be sin for us that we might become the righteousness of God in Him” (2 Corinthians 5:21).

see Hebrews: 2:14-15

The answer is found in "the Suffering Servant" chapter of Isaiah 53 and John 3:16.

Jesus is God, and he lowered himself to become man and be sacrificed by us. It has nothing to do with punishment.

Mark 10:45- "to serve, and to give his life as a ransom for many."

Jesus' sacrifice provides for us forgiveness for sins because he showed us what love is by that sacrifice, so that we may love each other the same way for reward in Heaven.

Romans 5:8-9- "But God proves His love for us in this: While we were still sinners, Christ died for us. Therefore, since we have now been justified by His blood, how much more shall we be saved from wrath through Him!"

God forgiving humanity is not the problem. He's already done that. That alone does not restore the relationship. We have to repent, which means to take action to make restitution and to take the responsibility for our actions. God forgives through love and we repent through love. God shows us what real love is; that He would make such a sacrifice for our sake is hardly imaginable.

As far as Christians are concerned, Jesus made no mistakes my friend, He came specifically to pay the price for the sins of all mankind including you, because no amount of works or good deeds can save us. Only Jesus saves and as God's Holy Word states:- There is no other name under heaven given among men by which we must be saved- and there is salvation in no one else.

Jesus didn't make any mistakes. Jesus gave Himself to be sacrificed as the full payment for all of our sins.

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Every belief except one will lead to eternal torment in the lake of fire for every person. Because nothing pays for our sins except the death and blood of Jesus, the sacrifice of Jesus that is already accomplished by Him . Jesus loves you! The truth is that Jesus is God, and Jesus died on the cross to pay for all of our sins in full, and then Jesus resurrected from the dead. Nothing else pays for our sins, not works, not deeds, not religions. So the only way to heaven and to avoid hell, is by believing in Jesus for eternal life (John 6:47), without adding any of your own works (Romans 4:5). Believe in Jesus to take you to heaven, and you will be in heaven, no matter what, guaranteed. That easy, thanks to Jesus! Tell Jesus that you thank Him that you will be with Him when you die, because you believe in Jesus! It is too late to be saved, after death.

He sacrificed his son. It was planned that Jesus would die the way he did.

I am not sure.