They leave because they don't understand spiritual truths.
Jesus also said.....
John 6:63 It is the Spirit who gives life; the flesh is no help at all. The words that I have spoken to you are spirit and life
The flesh is no help at all. Eating Jesus flesh isn't going to do anything for anyone.
But you aren't the Pope so I won't believe you, sorry.
1 Corinthians 11:27-29New International Version (NIV)
27 So then, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord. 28 Everyone ought to examine themselves before they eat of the bread and drink from the cup. 29 For those who eat and drink without discerning the body of Christ eat and drink judgment on themselves.
Please interpret these verses for me.