God hath not cast away his people which he foreknew. Romans 11:2
Imagine a big cream separator. You pour in the Holy Scriptures that are about Israel and turn the handle. All the blessings for Israel come out of one spout which you mark "The Church". The curses and warnings of future calamity, you label "Israel past".
Now there is a great problem in this. The judgement of God's people in the book of Revelation must apply to the Church! After all, in Replacement Theology, or Supersessionism, Israel is gone forever, to be replaced by the Church. Goodbye forever Israel, is how they think.
But is this new "replacement church" to go through the Great Tribulation? There is a way out, they think. All you need to do is say the church has already gone through the tribulation!
It was rough for a while, but we made it. Remember the sea turning red and all the air breathing creatures dying? Remember Nero as Antichrist? The angels blowing their trumpets and pouring out the wrath of God upon the earth? Remember the two witnesses (probably Calvin and Zwingli) in chapter 11?
For the church I was once in tried as hard as they could not to mention the book of Revelation, and certainly not to preach from it! It's all past anyway. When I read about the twelve (named") tribes of Israel in chapter 7, to one of their brightest worthies, he said, "That must be the church." How could the twelve tribes of Israel be the church?! Under Replacement Theology it could be!
These poor deluded souls, when asked, would not accuse me of teaching error, nor did anyone attempt to correct me. If a security guard could confound them, imagine what a real theologian could have done to them, those lying cowards!
Please see The Error of Replacement Theology.