I understand your reaction. But please think through and see what I am saying.
You speak biblical truth that mankind is blind to spiritual truths and cannot discern between good and evil.
10And the disciples came, and said unto him, Why speakest thou unto them in parables?
11He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
12For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.
13Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
14And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:
15For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
16But blessed are your eyes, for they see: and your ears, for they hear
I am simply saying that Jesus could have delivered His message a little better and speak more in tune with the people's understanding
Today I often hear preachers say that we need to speak the language of the world in order to reach out to them, as speaking churchy often offends the world.
54Whoso eateth my flesh, and drinketh my blood, hath eternal life; and I will raise him up at the last day.
55For my flesh is meat indeed, and my blood is drink indeed.
56He that eateth my flesh, and drinketh my blood, dwelleth in me, and I in him.
57As the living Father hath sent me, and I live by the Father: so he that eateth me, even he shall live by me.
58This is that bread which came down from heaven: not as your fathers did eat manna, and are dead: he that eateth of this bread shall live for ever.
59These things said he in the synagogue, as he taught in Capernaum.
60Many therefore of his disciples, when they had heard this, said, This is an hard saying; who can hear it?
61When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you?
62What and if ye shall see the Son of man ascend up where he was before?
63It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
64But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him.
65And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.
66From that time many of his disciples went back, and walked no more with him.
67Then said Jesus unto the twelve, Will ye also go away?
68Then Simon Peter answered him, Lord, to whom shall we go? thou hast the words of eternal life.
Here we can see that even Jesus disciples, the ones that Jesus said were privileged to see, (First scripture above) were challenged and frustrated by the sayings of Jesus. This reminds me of many Christians feelings today, who don't understand the book, but simply put their faith in Jesus.