I think that's only because English is your primary language.
Hmm. That could be the case. The whole kindergarten "friend" thing a bit ago threw me as well - pronouns are simply baked-in the american-english language. I would feel very awkward saying, "Shego is awesome because friend likes almost every edged weapon." Throwing away the pronoun and using friend, in my mind, implies a third person, not the subject of the sentence.
It is interesting to me how our neural pathways are defined by what we learn. In America we often teach children the names of things first. I've heard that children in China are often first taught the relationships they have to others first. Some feel Americans have an unnatural disposition to amassing things, while others feel Chinese have an unnatural loyalty to their family.
Added at: 09:37
I am perhaps more optimistic than you. I suspect that the people I've argued with most vociferously would be great fun to meet in person.
On the other hand, I can't hold a grudge - I can barely remember what a past argument was about, nevermind who it was with. So, to some degree, I can't comprehend that someone may remember the first time I said something that truly offended them and can remember me and the issue because of it.