I don't want to brain-wash anyone, I'm trying to understand why people won't listen to me so that I could explain myself better and get better results for both of us (he will understand me and show me why I'm wrong or vice versa). Giving people false assumptions or hiding various details from them just to prove my point is something I'm very opposed of.
(I should have said, forcing them to comply with your reasoning, rather than brain-washing. The latter contains far too many negative connotations to properly convey the meaning I intended.)
"I'm trying to understand why people won't listen to me"
Here's my opinion of this: sometimes, what makes sense to you is not necessarily going to make sense to someone else. This is because their minds have been conditioned to certain modes of thinking (just as you have) and have certain ways of perception that they feel most comfortable with. When a third-party comes in to question their preexisting worldview with a foreign reasoning, they become defensive, and sometimes even offensive, as it means for them to go back and reconsider something they thought they knew for sure.
Think of these perceptions as trees; one point-of-view branches off with several different points-of-view, which in turn, branch off to many others. Letting go of one (root), means letting go of the branches that follow it. This, I must imagine must be tiring for many.
From an typological point of view, as an INFJ (I'm assuming?) this is second nature to you, as Ni is your dominant function, and you are constantly perceiving/considering alternate view-points to select the best course of action. But many people are not as comfortable with their Ni/Ne, and tend to avoid engaging in it.
Or perhaps, these people are just trolls. You never know.
This is the internet after all.
"...so that I could explain myself better and get better results for both of us"
Maybe you should tighten up your arguments with a strong logical basis and eliminate any ethical bias, as many people consider ethics to be highly subjective. (Not that it would make much of a difference if you target audience is made up of trolls, or people who are too conditioned to a certain mode of thinking.)