And Jesus' main complaint was about the power structure that Judaism had become. Money changers, people sitting in high places demanding respect etc.... Read the scriptures. You will clearly see it. So then, people get the good news, and still it's the same wrong way that they always did even before that. That's what humans do. Always flawed and self interested to the very end. Always seems to return to the same habits, no matter what they are told. Even if Jesus Christ, the Messiah himself says it.<quoted text>Was not Christianity (an extension or fulfillment) of already established Judaism ...?
Read the whole of Matthew 23 again. it's not much different than what people ended up doing today as well. "Father", "Reverend". Reverend comes from the word reverence.
"8 But you are not to be called Rabbi, for you have one Teacher, and you are all brothers. 9 And do not call anyone on earth father, for you have one Father, and he is in heaven. 10 Nor are you to be called instructors, for you have one Instructor, the Messiah. 11 The greatest among you will be your servant. 12 For those who exalt themselves will be humbled, and those who humble themselves will be exalted."
People always need a power structure to tell them what to do, because they are so hypnotized that they don't even know how to think a thought that is actually their own. It's always the thought of someone that they respect or honor. Whether someone might have some good knowledge to offer you or not or some advice, do not ever respect them above you because we are all equal in the eyes of God.
Do not fall for false titles. Information is information. Advice is advice, but never put them above you or revere them. Just take the helpful info and thank them, and then examine the info with your own heart as though you heard it from an equal that is ultimately no better than yourself. Never listen to anybody simply because of their title itself. Either their words will strike you as wise or they won't, regardless of their title. Their title itself should never have anything to do with it. If it does, then that is when you are ready to be brainwashed. You are no longer actually listening and examining the info itself, you are merely accepting it because of the title of the person that it came from.