Composers for the concert hall long ago discarded the need to have an answer in terms of a sympathetic listeners; they've done this both in theory and in practice. Is it any wonder that such a deeply entrenched hostility towards the phantom "modern music" exists?
Yes. One has only to recognise that some music once thought of as audience-unfriendly has subsequently become much less widely regarded in that way to realise that, like everything else in life, it is bound to change with time; the same could be said of the ways in which certain composers go in and out of fashion, despite the (obvious) fact that their music does not itself change.
I feel that ahinton does his own music, and music of many of his colleagues, a great disservice, when confronted with the grievances of rachfan, merely refuses to not recognize the source of those grievances.
I do nothing of the sort. "rachfan" has expressed some personal opinions, to all of which he is entitled and by no means all of which I took to be "grievances" in any case. When the source of some of his remarks - which I certainly do recognise (and I would have expected you to recognise that I took sufficiently seriously to set aside some time in responding to them) - is personal opinion, I do not take those remarks as gospel but as individual personal opinion. I therefore do not understand what particular disservice you believe I am doing, so I will be interested to hear your answer to this.
I think for the most part, composers living today, who are living in the esoteric atmosphere of their own music and music rarely heard by others, would be well advised to not pretend as though people's incomprehension of "modern music" has no basis in reality. Ignoring those trends will only create more hostility. Or put another way, not accepting that these oft-heard complaints have a basis in reality is a great weakness, which will not aid in the general acceptance of new music.
There are several shortcomings in this paragraph. Firstly, all living composers live in an atmosphere of a wide range of music, not merely their own and that of their composer colleagues; such coccooned isolation would indeed be as unhealthy as you imply, but it is also exceedingly rare. We all know that many people claim not to "comprehend" what we do, but we also recognise that we are a minority within a minority as "classical" composers in any case; furthermore, whilst I cannot speak for other living composers, I am personally far more concerned with how people respond to my music than I am with how individual listeners think that they "comprehend" it; one does not have to know all about the intricate intellectual and other creative processes undergone by Byrd, Ferneyhough, Bach, Carter, etc. in order to respond meaningfully to their works, whether positively or negatively. It's pointless just listening to complaints about "new music" (whatever that may be) if one does not also listen to other more positive responses. As for the notion of composers deliberately writing in ways that are hostile to audiences, that is largely an unfounded premise for, apart from any other consideration (as composers as diverse as Sorabji, Birtwistle and Carter have all observed independently of one another), no composer can possibly know in advance who will listen to their music or how they will respond to it. "New music" is, as I have recently observed elsewhere on this forum, music that has been recently composed and the term therefore embraces a vast variety of concurrent musical styles and disciplines and means of expression; your remarks, on the other hand, seem selectively to focus on certain contemporary musical persuasions only, as distinct from the larger picture, so the conclusions at which you then arrive are inevitably relevant (insofar as they are relevant at all) only to a certain proportion of present-day music in any case.
Best,
Alistair