The Romans killed Yashua. A Roman judge (Pontius Pilate) turned Him over to the Roman soldiers who crucified Him.
Pilate and those involved were a means to an already predicted end.
What was it Jesus said to Pilate? - "...Threfore, he who delivered me over to you has the greater sin." Jn 19:11
At whose request???
The Roman legions in ancient Israel/Palestine were made up of local Auxiliaries led by Roman officers. So the “Roman soldiers” at the crucifixion were very likely ethnic Palestinians.
Pilate was in fact a Spaniard by birth, and the post he held was that of praeses (gen. praesidis, whence our "president": literally, "sits before"), the lowest rank of procuratorial officials whose generic designation was praefectus, an invention of Caesar Augustus.
Augustus created the prefectures as a counterweight to, and a control mechanism over, the old Roman republican system of governance by praetors, propraetors, and proconsuls, all of whom were senators, persons in the cursus honorum of the old curule offices of the Republic.
The idea of the prefectures was to create a cadre of civil servants who worked on straight pay, did not strip provinces to enrich themselves as the senatorial officials had typically done, and who received their offices directly from Caesar. The most senior was the prefect of Egypt, and next to him the prefect of the Praetorian Guards in Rome, and after him the fleet prefect at Misenum, on the Bay of Naples facing Pompeii.