Matthew 15: 12-14. “Then came His disciples, and said unto Him, Knowest Thou that the Pharisees were offended, after they heard this saying? But He answwered and said, Every plant, which My heavenly Father hath not planted, shall be rooted up. Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.”
To get the backstory, you need to read again from the beginning of chapter 15. Particularly, Jesus had just clearly stated that it is not what enters our mouths that defiles us; rather, it is what comes out of our mouths that defiles us.
The Pharisees were indignant! How dare He make light of their precious oral tradition requiring people to wash their hands before eating! So they were offended.
How many times do we read or hear of people being offended by Christianity? It happens more and more often as our society devolves into godlessness. It happens any time another religion comes face to face with Jesus. Persecution of Christians is heating up all over the world, and we need to be paying attention.
Every false religious leader will suffer judgment, Jesus said.
Jesus told His disciples to leave those offended Pharisees alone. Don’t argue with them or try to persuade them, because they will not hear. Then He compared the Pharisees to blind men leading other blind men. The only possible result of such behavior is that they will all end up stumbling into the ditch.