Why is こ〜 used towards 2nd person in derogatory speech?


Why is the こ prefix for pronouns used in derogatory speech in the presence of
the other person, like:

> この野郎!  
>

or

> こいつ。何言いやがる？

Or maybe the question should not be why it's not こ〜, but rather "why not そ〜",
as in referred speech I hear あの野郎, or あいつ, but never そいつ.

In comparison what would その or そいつ sound in these examples? Would そ〜 give more
nobility? Recognition of the other person, while こ〜 makes them more
subordinate?




In a conversation, こ〜 (これ、この人、こいつ and so on) points to something / someone
near the speaker. そ〜 points to something / someone near the listeners, and あ〜
points far from both. But **こ〜 and そ〜 don't point to the speaker / listeners
themselves.**

Now, what if you think / murmur to yourself about the listeners in the middle
of the conversation? You are now both the speaker and listener. People who
once were the listeners are now just a topic of your thought, so you point to
them by using こ〜。 For example,

> (...こいつら、ちゃんと俺{おれ}の話を聞いているのか?)

When you use こ〜 to point to the listeners, you are pretending to be speaking
to yourself which conveys nuances such as anger against the listeners.

