Luke 24:20

“And how the chief priests and our rulers delivered him up to be condemned to death, and crucified him.”

They then went on to describe the heinousness of those who had condemned Him to the cross. The chief priests and their own rulers had ‘delivered Him up to be condemned to death, and had crucified Him'. It was still something that they could hardly believe. They found it incredible. But nothing was more vivid to them than the fact that He had been snatched from among them even while the festivities in Jerusalem had been going on, and had in an amazingly quick time been put on trial and sentenced to death, and then executed. It had all happened so suddenly without warning. And then He had been crucified, the most hated and feared death of them all, for it rendered a man accursed. The crucifixion was something that had come home to them in all its stark realism, for at this point the idea of the cross did not contain any of the redeeming features that would attach to it later when it became something that could be gloried in (Galatians 6:14). At that stage it was simply a barbaric and horrific method of dying that had left them shaken and dismayed.

‘They crucified Him.' This means that they had had Him crucified as is evidenced by the fact that they had ‘delivered Him up'. But Luke has no hesitation in putting the blame on them.