We provide feedback to all applicants. Some take it poorly and this is the risk we run. Regardless of the communication differences your "friend" may have felt

We provide feedback to all applicants. Some take it poorly and this is the risk we run. Regardless of the communication differences your "friend" may have felt, there is no justification for you to have posted the insinuations comprising the rest of your comment. Seeing this kind of response weighs heavily against the risk-reward calculation for me as an interviewer to continue my commitment of providing feedback to all applicants.