Immaturity

The worst kind of immaturity (in my humble, but deadly accurate opinion) is when someone attacks another person's life/dreams/accomplishments/etc.; when in the middle of an argument, disagreement, or misunderstanding, the person who is fast losing their footing, suddenly lets loose with a mile-long monologue of insults that have nothing whatsoever to do with the original topic of discussion.

Depending upon the relationship between the two, this can be laughable (as in, the one person knows so very little of the other that their "attack" is completely ridiculous), or so horribly painful, that one cannot even begin to describe the feelings that accompany this type of verbal abuse.

I have a difficult time respecting a person who does this type of thing and is not ashamed of it, but rather, flaunts it, as if it is something to be proud of.

It is never acceptable, or Christ-like in any way, to attack another person in such a fashion. To cut at someone's day-to-day life, and attack their dreams; to be so set on having the 'upper hand', so as to have to literally slash the other person down, is the epitome of immaturity.