The Romans needed no such propaganda.
If people believed that idea, it wasn't because the Romans needed them to.
I never claimed the propaganda was spread by the Romans. Please, read and repeat exactly what I write.
I wrote that people of antiquity believed the propaganda that the Jews killed the Son of God as is evident in apologetic writings.
This propaganda was believed and propagated for hundreds of years until the Roman Church was started in the 4th century
This is a partial list of 10 apologetics who spread the propaganda from the 2nd to the 4th century.
1.
The author of Acts
Acts 2.-----22
Ye men of Israel, hear these words;
Jesus of Nazareth........ ye have taken , and by wicked hands have crucified and slain
2.
The Pauline writers.
1 Thessalonians -------14 For ye, brethren, became followers of the churches of God which in Judaea are in Christ Jesus: for ye also have suffered like things of your own countrymen, even as they have of
the Jews: 15 Who both killed the Lord Jesus, and their own prophets, and have persecuted us.
3.
Aristides
The Apology---------The Christians, then, trace the beginning of their religion from Jesus the Messiah; and he is named the Son of God Most High. And it is said that God came down from heaven, and from a Hebrew virgin assumed and clothed himself with flesh; and the Son of God lived in a daughter of man. .......
But he himself was pierced by the Jews, and he died and was buried.
4.
Justin Martyr
Dialogue with Trypho -------Accordingly, these things have happened to you in fairness and justice, for
you have slain the Just One
5.
Irenaeus
the Jews had become the slayers of the Lord (which did, indeed, take eternal life away from them),
6.
Hippolytus
Treatise Against the Jews-----7. But why, O prophet, tell us, and
for what reason, was the temple made desolate?.......
it was because they killed the Son of their Benefactor, for He is coeternal with the Father.
7.
Tertullian
Answer to the Jews ----let the Jews recognise their own fate—a fate which they were constantly foretold as destined to incur after the advent of the Christ, on account of the impiety with which
they despised and slew Him
8.
Origen
Against Celsus 1----although not believing in Jesus as the Christ, in seeking after the cause of the fall of Jerusalem and the destruction of the temple, whereas he ought to have said that
the conspiracy against Jesus was the cause of these calamities befalling the people, since they put to death Christ
9.
Lactantius
The manner in Which the Persecutors Died---on the tenth of the kalends of April, as I find it written,
Jesus Christ was crucified by the Jews.
10.
Eusebius
Demonstration of the Gospels----And it is plain even to the blind, that what they saw and foretold is fulfilled in actual facts from the very day
the Jews laid godless hands on Christ, and drew down on themselves the beginning of the train of sorrows.