Jesus crucified by demons
The wisdom which none of the rulers of this age has understood; for if they had understood it they would not have crucified the Lord of glory... (1 Corinthians 2:8)
If the demons and/or fallen angels really knew who Jesus was, they would not have crucified him. In other words, crucifying Jesus ultimately would destroy them, but they didn't know this. They knew Jesus was more than just a human, and that he had super powers which he was going to use against them, and they thought they could kill him thereby neutralizing these super powers.
Here's evidence that the above verse is referring to demons and/or fallen angels:
When He had disarmed the rulers and authorities, He made a public display of them, having triumphed over them through Him. (Colossians 2:15)
Referring to the effects of the crucifixion of Jesus.
For our struggle is not against flesh and blood, but against the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places. (Ephesians 6:12)
For by Him all things were created, both in the heavens and on earth, visible and invisible, whether thrones or dominions or rulers or authorities — all things have been created through Him and for Him. (Colossians 1:16)
So that the manifold wisdom of God might now be made known through the church to the rulers and the authorities in the heavenly places. (Ephesians 3:10)
Note that the rulers and authorities reside in the heavenly realm, in the supernatural realm. In other words, they are angels, presumably demons and/or fallen angels who are being constantly reminded of their imminent doom by the church (probably because Jesus and the Holy Spirit reside in the church). This implies they are constantly watching the church and interacting with it. Yikes!
For I am convinced that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers... (Romans 8:38)
Who is at the right hand of God, having gone into heaven, after angels and authorities and powers had been subjected to Him. (1 Peter 3:22)
The point is, there is a strong emphasis on the demons and fallen angels, and that they crucified Jesus and, in doing so, they set the stage for their ultimate destruction.