Thank you so much Chishino, God used your comment for inspire me about this post, I ask to God that He bless you. I'm praying for you since today.
This is a great question: why was Jesus crucified?
God loves His Son, why did God do nothing?
I say God is the same yesterday, today and tomorrow, for any day.
Now, about the happened.
Jesus was crucified because the humanity had, and have yet, many sins.
Every sin is bad and must to be paid.
When Jesus died crucified, He paid for the sins, it's true! But we need this, if Jesus died for our sins, He had no sins, then we should be thankful.
God gave me the text, that I read (II Corinthians 1, 12):
namely our conscientious conviction
that we have always behaved towards everyone,
and especially towards you,
with that unalloyed holiness that comes from God,
relying not on human reasoning
but on the grace of God."
If you know why Jesus was crucified and you do wrong things yet, thus you are wasting your salvation.
Jesus went to the cross because you should have gone, but He loves you and He decided: "I'll died in your place".
The sins are the same yesterday, today and tomorrow, because the Daemon is the same.
Let's pray now (this is to you, Chishino. Don't forget God loves you and He wants you love Him):
Full of Grace,
The Lord is with thee.
Blessed art thou among women,
and blessed is the fruit
of thy womb, Jesus.
Mother of God,
pray for us sinners now,
and at the hour of death.