Two sentences are about to get quoted, and everyone in earshot knows both of them by heart.
The first is the Shema — “Hear, O Israel! The LORD is our God, the LORD is one! You shall love the LORD your God with all your heart and with all your soul and with all your might” (Deuteronomy 6:4–5). Faithful Jews said it morning and evening. It is the closest thing Israel had to a pledge of allegiance, and it was recited by children before they could read.
The second is buried in the middle of a chapter about honest scales and paying day laborers on time: “You shall not take vengeance, nor bear any grudge against the sons of your people, but you shall love your neighbor as yourself” (Leviticus 19:18).
Now read that verse again slowly, because this is the whole reason a question is coming. The Hebrew word behind neighbor is rea’, and the line right before it says “the sons of your people.” In its own paragraph, the command is about how Israelites treat fellow Israelites. So a careful reader — a good reader — is entitled to ask how wide that circle runs.
And Leviticus itself refuses to let the circle stay small. Fifteen verses later: “The stranger who resides with you shall be to you as the native among you, and you shall love him as yourself, for you were aliens in the land of Egypt” (Leviticus 19:33–34). The foreigner living among you gets the same command, in the same words apart from the name of the person, with a reason attached: you know what it feels like.
So “Who is my neighbor?” is not a stupid question, and it is not obviously a dodge. It is a real question the text raises on purpose. Hold on to that. It will make what Jesus does next far more interesting than a scolding.