“Now the soldiers took Him away into the palace (that is, the Praetorium), and they *called together the whole Roman cohort. And they *dressed Him in purple, and after twisting together a crown of thorns, they put it on Him; and they began saluting Him: “Hail, King of the Jews!” And they repeatedly beat His head with a reed and spit on Him, and kneeling, they bowed down before Him. And after they had mocked Him, they took the purple cloak off Him and put His own garments on Him. And they *led Him out to crucify Him.”

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Mark‬ ‭15‬:‭16‬-‭20‬ ‭NASB2020‬‬

Many groups, including the Pharisees, the Sadducees, and yes the Romans, were responsible. Not sure how anyone could deny Roman complicity, crucifixion was a Roman punishment after all, not a Jewish one.