why did Jesus say not many would make it? here ares some verses for you to exmine closely;
Enter ye in by the narrow gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many are they that enter in thereby. For narrow is the gate, and straitened the way, that leadeth unto life, and few are they that find it.(Matthew 7:13–14, ASV)
And one said unto him, Lord, are they few that are saved? And he said unto them, Strive to enter in by the narrow door: for many, I say unto you, shall seek to enter in, and shall not be able. (Luke 13:23–24, ASV)
Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doth the will of my Father who is in heaven. (Matthew 7:21, ASV)
Peter likewise wrote:
And if the righteous is scarcely saved, where shall the ungodly and sinner appear? (1 Peter 4:18, ASV)
JJesus taught that the way to life is narrow, many follow the broad way that leads to destruction, and only a few find and remain on the path that leads to life.