What the text says. The sentence sits in a long list of Claudius's administrative acts, between the freedom of the Rhodians and the seating of German ambassadors, and it is all Suetonius says: "He banished from Rome all the Jews, who were continually making disturbances at the instigation of one Chrestus" (Claudius 25, Thomson/Forester translation). The Acts of the Apostles records the same emperor's order from the other end: Paul at Corinth "found a certain Jew named Aquila, a man of Pontus by race, lately come from Italy, with his wife Priscilla, because Claudius had commanded all the Jews to depart from Rome" (Acts 18:2, ASV).
What it shows, plainly. A Roman biographer, writing c. AD 121 with access to imperial records, independently confirms that Claudius (emperor AD 41-54) expelled Jews from Rome, which is what Acts 18:2 reports in passing. That much is not disputed. Everything beyond it is.
The contested points, each side stated. (1) Who was "Chrestus"? The majority reading, held by most historians of early Christianity, is that "Chrestus" is Christus, Christ, misspelled in the ordinary way (Chrestus was a common Greek name, and the Tacitus manuscript makes the same slip), and that the "disturbances" were quarrels inside Rome's synagogues over the preaching of Jesus as Messiah; on this reading Suetonius, who says "one Chrestus" as though the man were present in Rome, has misunderstood his source and has Christ agitating in Rome in the 40s. The minority reading takes the text at its word: an otherwise unknown Jewish agitator actually named Chrestus stirred up trouble in Rome, and the notice has nothing to do with Christianity. The 1855 editor of the translation held here, Thomas Forester, already took the first view; this file records both and endorses neither. (2) When? The fifth-century Christian historian Orosius dates the expulsion to Claudius's ninth year, AD 49, and claims Josephus as his authority, but no such passage exists in Josephus, so the date rests on Orosius alone. The contemporary historian Cassius Dio (60.6.6) records that early in the reign, in AD 41, Claudius did not expel the Jews, because they were too numerous, but forbade them to assemble. Some scholars identify Dio's measure with Suetonius's notice and put the event in 41; others keep the two apart and accept 49, which fits the sequence in Acts (Aquila "lately come from Italy" when Paul reached Corinth); the question is open. (3) "All the Jews". Whether the whole Jewish community left Rome, or only the leaders of the disturbance, is likewise argued; Dio's remark about their numbers is used on both sides.
Sources: Suetonius, Claudius 25; Acts 18:2; Cassius Dio, Roman History 60.6.6; Orosius, Histories against the Pagans 7.6.15-16.
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