God made Christ to [judicially] be sin on our behalf. He became sin for us. He got the guilt.

2 Corinthians 5:21 AMP - "He made Christ who knew no sin to [judicially] be sin on our behalf, so that in Him we would become the righteousness of God [that is, we would be made acceptable to Him and placed in a right relationship with Him by His gracious lovingkindness]."