At times, he was stern with those who followed him. At times he was compassionate and loving. There were also times when he was aggressive in providing correction to errant practices. The latter was most often directed to those who deemed themselves as spiritual directors and teachers.
The problem seemed to stem from a downward progression of extrapolation and redaction of God's revealed truths. In short "This is what was said...this is what it means....and this is how it applies."
So Jesus often is heard stating: "You have heard..... but I say to you....." - thus turning what was learned and handed down completely on its head. And I don't think he's finished doing that.
He prefaced his promise of sending the Holy Spirit to us by this qualification in John 16:12-15:
“I have much more to say to you, more than you can now bear. But when he, the Spirit of truth, comes, he will guide you into all the truth. He will not speak on his own; he will speak only what he hears, and he will tell you what is yet to come. He will glorify me because it is from me that he will receive what he will make known to you. All that belongs to the Father is mine. That is why I said the Spirit will receive from me what he will make known to you.”The problem persists today. It is a product of pride and the lack of humility that Paul alluded to when he stated "...Those who think they know something do not yet know as they ought to know" and that we all "know in part." There is "much more" to learn as God's pure truth progresses through the illumination of God's Spirit present through the diversity of his Body on earth - the Universal Church in its entirety.
So let's not open our mouths and pontificate as if we have our fecal matter completely consolidated.