People have been trained to think that Jesus was a totally mild mannered being that never showed human emotions. In fact, this is not true. He did not dwell in an ivory tower or have his head stuck in the sand. He was in the world, okay, not of it, but he saw things that really pissed him off. Through his indignation he taught. He pointed out when people were blinded to truth; he disliked hypocrisy; was not fond of those who took from the poor to fatten their own pockets; really couldn't tolerate dogma; slammed those who called for violence; and definitely did not like those who thought they were superior to others. By pointing out the ill of humanity and society (darkness), he was able to create a brighter light.
Positive thinking is wonderful but also woefully inadequate as the only tool to create your reality. Yes, it would be nice to see the positive in all things, but it can be necessary to see the negative in order to understand the positive. La-la land is not a good teacher. It is often through harsh lessons that we learn the most. Remember the Prodigal son? It was by going out and experiencing ALL that life was about that earned him a higher level of awareness. Those who dwell in ivory towers may understand the theories, but is only through experience that the theory becomes kinetic.
"Woe to you, scribes and Pharisees, hypocrites! for you tithe mint and dill and cummin, and have neglected the weightier matters of the law, justice and mercy and faith; these you ought to have done, without neglecting the others. You blind guides, straining out a gnat and swallowing a camel! ... Woe to you, scribes and Pharisees, hypocrites! for you are like whitewashed tombs, which outwardly appear beautiful, but within they are full of dead men's bones and all uncleanness.