I think Christian missionaries should live among the people exhibiting their Christianity in their daily lives. If the people see something in their lives that is missing in their own lives they will ask about it, which gives the missionary permission to tell them about their faith.

2) The Hebrew scriptures, or the Old Testament, represent a religious tradition that is independent of the later Christian faith. The Hebrew scriptures aren't about Jesus, although the Christian scriptures include many references to the Hebrew scriptures. To honor the fundamental differences between the two sets of scriptures doubles the spiritual significance of the entire Bible.