To the people saying the Romans killed Jesus
Yes they made the execution but The Jews made the call.
The Pharisees(Jewish religious leaders) had him arrested and brought before Pilate. The Romans at the time had dominion over Judea. Pilate was the emporer. They demanded they have Jesus killed.
Pilate told the Jews, there is no just cause to kill this man, there are no valid charges. But the people persisted. It’s a custom for the Roman’s to give back a prisoner on the Passover, they instead chose Barrabas and demanded Jesus be killed.
It’s all very political, you can read about why the Jews wanted him dead in the book of John.
The Pilate part I referenced is in John 18.