How can the High Priests and the Jewish leaders of Jerusalem arrest Iesus without causing an uproar among the masses of people who have witnessed the miracles and healings that Iesus has performed, and who believe that He comes from God?
Luke chapter 22 tells us that the answer came from one of Iesus' disciples: Iudas Iscariot.
The only way to capture Iesus and hand him over to the Roman Governor is to find him when he is privately meeting his disciples, "when the people were not there" (verse 6). That's the very thing Iudas Iscariot proposed to do in his discussion with the High Priests and Commanders (verse 4).
4 He went and conferred with the High Priests and Leaders as to how he should deliver Him up to them.
5 This gave them great pleasure, and they agreed to pay him.
6 He accepted their offer, and then looked out for an opportunity to betray Him when the people were not there.
Luke 22:4 - 6 Weymouth New Testament
In the end, Iesus was captured because his disciple Iudas led a crowd comprising the High Priests, the Temple Leaders, and Elders, armed with swords and clubs, to the garden of Gethsemane at the foothill of the Mount of Olives, where Iesus was praying in private with His disciples, to arrest him (verse 52).
Iudas betrayed Iesus the Anointed One "when the people were not there".