Is being nice an act of kindness ?

I was on my way to dreamland , until a tweet I saw from John Piper gave me a blow in the head. You could follow him in twitter at @JohnPiper. Here's that tweet :

"Let a righteous man strike me—it is a kindness." Psalm 141:5 So kindness and tenderness are not the same.

Why did this tweet gave me such an effect ? I am a genuine phlegmatic, a.k.a  peace lover. I am doing quite a good job there, even close to a fanatic, if I have to grade myself. I would give all ends to preserve peace. This is not exaggerating, I would gladly give myself as a sacrifice to calm a conflict involving myself. Prove ? Well some time ago, all the newly graduates for Chemical Engineering major were gathered by the study program chair to give critics and inputs. After the session ended, I met with my research supervisor and told him about the session. This is what he responded to :

"Bisa toh kamu Hans ngritik gitu? Kamu gak tegaan begitu."
"Hans can you really give a critic ? I see you incapable of doing so, you are too nice. "

I thought for a while, and indeed I did not give any harsh comment in the session. Although I find it hard to distinguish the reason to my action were ignorance or being nice (I have both properties as a phlegmatic) , the purpose -which I unconsciously create- is to just give the atmosphere the peace it deserves. "The session have been conducted for a long time, the people before me have made my points, for the sake of not wasting anyone's time I will just say a quick comment." This behavior might truly create peace for a short term, but is a seed for chaos in the long run. 

It is like letting a crumbling airplane full of busy passengers wanting to take off. The passengers were not in the light about the plane conditions, they just want to get to their destinations as fast as they can. What should we do for the passengers sake? The right decision in this case, would be to delay the flight for a maintenance or change vehicle. Some would complaint, and even call us names for saving their asses. That is temporary chaos, but in the long run they will eventually came to the truth and thanking us. 

Doing what others want is not kindness, it is even far from love. It is an act of ignorance, not caring. I must be getting old now, because now I see discipline as an act of love. It is so much better to hurt the one we love now, rather than letting them suffer at a later time. Stop following our heart so much, use that brain for a change. Men, make a girl cry now with the truth rather than constantly giving fake consolation. That is kindness. 

Si vis pacem, para bellum. - If you want peace, prepare for war.