Shared ground
Luke presents John’s criticism of Herod Antipas as a direct cause of John’s imprisonment. The text is clear about the basic chain of events: John publicly confronts a ruler; the ruler retaliates using state power.
Luke also frames Herod’s actions morally. Herod’s relationship with Herodias is highlighted (“his brother’s wife”), and then Luke widens the charge to “all the evil things” Herod had done. John’s rebuke is not pictured as a one-time comment but as an ongoing confrontation.
Where interpretation differs
Who is “his brother”? Some readers think Luke expects the audience to know which brother without explanation; others try to identify the brother by comparing Gospel accounts and later historical reports. The passage itself does not supply the brother’s name.
What does “all the evil things” mean? Some read it as a general summary of known abuses (Luke compressing the story). Others treat it as a signal that Herod’s wrongdoing was broad and partly unspecified, not limited to this marriage situation.
Is Luke following strict timeline here? Some think Luke is briefly reporting what happened later (a preview) so that Jesus’ baptism can be narrated without John still being on stage. Others read it as roughly sequential. Either way, Luke’s point is the same: John’s rebuke led to suppression.
Why the disagreement exists
Luke’s wording is short and assumes background knowledge: “his brother,” “all the evil things,” and the placement of this note between John’s preaching and Jesus’ baptism. Because Luke does not pause to give names, a list of misdeeds, or a dated timeline, readers fill gaps differently.
What this passage clearly contributes
These verses show how Luke connects moral critique and political power: a ruler can treat public rebuke as a threat and respond with imprisonment. Luke also characterizes John as a prophet-like figure who confronts elite wrongdoing, and he characterizes Herod’s imprisonment of John as one more “evil” act, not a neutral administrative decision. This brief notice also helps transition the narrative focus toward Jesus, while signaling the cost of John’s public ministry (compare Luke 3:21 where Jesus is baptized after this note about John).