Give him a break. Murkrow simply has a wish to deal with people in a very forth-right manner. Its his prerogative as a T, as that of yours to deal with them in a gentle manner.
We Ts value clarity and directness more than sensitivity of approach, so we sacrifice the latter in favor of the former.
You have it the other way around. He means no offense with his candor, those who read it otherwise simply misunderstand. It is a problem with them, not him.
In my opinion candor is a very important quality in relationships. More important than ostensible sensitivity. If we want true harmony in our relationships, it is important to point out what is not working, as clearly and directly as possible, so we be in the position to fix them accordingly. This will lead to greater harmony because that will purge the relationship of many defects it has been plagued with hitherto.
That MSN conversation wasnt a case of a major problem to be solved in a relationship, but rather a basic example of T commentary that is to be read impersonally, rather than personally. Those who read it from a personal angle simply misunderstand. Because of this, it is a mistake to attribute unbenign motives the Thinker('jerk', 'insensitive' ..E.G 'ENTJs get 'BETTER' as they grow older'), and closer to home, this Thinker in particular.