Replacement Theology - Warning: Contrary to scripture, a test for the Church, damaging to Israel

Replacement Theology is a popular doctrine in many churches. Is it biblically accurate, or is it untrue, and if untrue, dangerous? What does the word of God say about Israel and the Jewish people during New Testament times, and especially during the upcoming days as things heat up for the world? What does God expect of His Church in these days in regards to the Jewish people and their troubles and challenges, as He deals with them? Critical times. Critical questions.