Shared ground
Luke presents Zacchaeus as a socially suspect but important figure: a “chief tax collector” who is also “rich.” The story stresses obstacles (crowd, height) and Zacchaeus’s determined effort to see Jesus. The turning point is Jesus’s initiative: he stops, looks up, calls Zacchaeus by name, and announces a same-day stay at Zacchaeus’s house.
The crowd’s reaction is part of the meaning. People interpret Jesus’s lodging choice as inappropriate because Zacchaeus is “a sinner.” Whatever exactly stands behind that label, the text makes clear that association and hospitality are the flashpoint.
Where interpretation differs
What “I must stay at your house” means. Some readers hear “must” as Jesus expressing a divine necessity or settled purpose, not merely a convenient plan. Others take it more simply as urgent intention in the moment (“I’m staying with you today”), without implying a larger claim beyond the episode.
Who “they all” are. Some read it as the whole crowd in general grumbling; others think Luke is using broad language for a recognizable subset (the critics who are already predisposed to object).
What “sinner” means here. Some understand it mainly as moral wrongdoing (Zacchaeus is personally corrupt). Others stress the social-religious stigma attached to the tax-collector role under Roman rule; “sinner” then points to his public reputation and perceived compromised loyalties, whether or not every accusation is proven.
Why the disagreement exists
Luke gives no direct explanation of the crowd’s reasoning beyond the label “sinner,” and he does not yet narrate any specific past actions by Zacchaeus in vv. 1–7. Also, the word “must” can signal strong resolve or deeper necessity depending on context. These gaps leave room for multiple plausible readings while staying within the text.
What this passage clearly contributes
This scene shows Jesus interrupting his “passing through” Jericho to publicly associate with a man viewed as disreputable. It highlights Jesus’s knowledge and authority (calling Zacchaeus by name; directing him to come down), and it exposes a recurring tension in Luke: Jesus’s welcome and the crowd’s boundary-making. The passage also sets up expectations for what Jesus’s presence in a home signifies—relationship, social recognition, and controversy—before the story continues beyond v. 7 (see Luke 19:8).