Because the gospel of Christ has been perverted into money and ease, courage in the face of being mocked, rejected, and worse is basically not known. Jesus never promised the true Christian life would be easy instead He said,
John 16:33 KJV These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world.
John 15:18 KJV If the world hate you, ye know that it hated me before it hated you.
A form of Christianity is easy, a true believer who walks the narrow path is not. Take your bible unashamed.
Mark 8:38 KJV Whosoever therefore shall be ashamed of me and of my words in this adulterous and sinful generation; of him also shall the Son of man be ashamed, when he cometh in the glory of his Father with the holy angels.