Jesus asked who acted like a neighbor in order to get the lawyer out of the loophole looking paradigm and see how God's love is to be shared with all kinds and sorts of people. Even syncretistic foreigners.
Jesus, however, didn't ask questions about how we are to treat one another. He was clear, direct, and unwavering in His command to "love one another as I have loved you" (John 15:12). Go and do likewise. No question here. Just go and love like God has loved you.