Causing a minor stir on the internet is this 
Commonweal article by Joseph Bottum - "
The Things We Share." Bottum, a former editor of 
First Things and an alleged conservative Catholic, has apparently decided for unconditional surrender on the issue of gay marriage.
As others have remarked, the article is a strangely rambling and lengthy piece. I'm not going to address any of the arguments Bottum makes for gay marriage here - others have done that better than I can (Ed Feser's take is
 here.) Instead I'd like to discuss the nature of the things that it is that Bottum shares.
For Bottum this is principally folk music and specifically bluegrass music. "The Things We Share" is framed by Bottum's relationship with Jim Watson, like Bottum a bluegrass musician, but with the difference that Watson happens to be gay. And in the end, this makes all the difference, at least when it is combined with Bottum's Catholicism:
A
 few years ago, his friendship began to cool, bit by bit. You understand
 how it is: a little here, a little there, and last time I was through 
New York he didn’t even bother to answer my note suggesting we put 
together one of our low-rent urban hootenannies. The problem, our 
conversations had made pretty clear along the way, was that I am a 
Catholic, and Jim is gay.
Well, actually, gay isn’t the word he would 
use. I have what might be the worst ability to recognize sexual 
orientation on the planet, but no one needed sensitivity to guess Jim’s 
views. Not that he was campy or anything when I knew him, but he was 
always vocal about his sexuality, naming himself loudly to anyone nearby
 with words that polite society allows only in ironic use by gay men 
themselves.
Anyway, Jim gradually started to take our difference 
personally, growing increasingly angry first at the Catholic Church for 
its opposition to state-sanctioned same-sex marriage and then at 
Catholics themselves for belonging to such a church. His transformation 
didn’t come from any personal desire to marry—or, at least, from any 
desire he ever articulated or I could see.
A few years ago, his friendship began to cool, bit by 
bit. You understand how it is: a little here, a little there, and last 
time I was through New York he didn’t even bother to answer my note 
suggesting we put together one of our low-rent urban hootenannies. The 
problem, our conversations had made pretty clear along the way, was that
 I am a Catholic, and Jim is gay.
Well, actually, gay isn’t the word he would 
use. I have what might be the worst ability to recognize sexual 
orientation on the planet, but no one needed sensitivity to guess Jim’s 
views. Not that he was campy or anything when I knew him, but he was 
always vocal about his sexuality, naming himself loudly to anyone nearby
 with words that polite society allows only in ironic use by gay men 
themselves.
Anyway, Jim gradually started to take our difference 
personally, growing increasingly angry first at the Catholic Church for 
its opposition to state-sanctioned same-sex marriage and then at 
Catholics themselves for belonging to such a church. His transformation 
didn’t come from any personal desire to marry—or, at least, from any 
desire he ever articulated or I could see.
Bottum clearly misses the friendship with Jim, but what is it that he misses? Like Bottum, I am a folk musician, but instead of bluegrass I play traditional Irish music, not too difficult to find here in the Boston area. There are  players I have known off and on for fifteen years, and others I have played with consistently over that time. There are very few, maybe one, that I could call a genuine friend, including players I have spent hundreds of hours playing with. I doubt any of them are aware of this blog, and some would be put off - just like Jim - if they read it. On the other hand, I started last year attending a lectio divina group on Mondays. Although I have spent far, far fewer hours in the lectio divina group than I have in Irish music sessions, people who have known me for only a few hours on Monday know me much better than anyone in the Irish music sessions who have played with me for years.
And the reason is that true friendship, as Aristotle teaches us, can only be based on the 
good, and therefore also on truth. The Irish music tradition was founded in poor farmers playing in the kitchen or pub after a long day's hard work; these farmers shared a Catholic faith and a dedication to family that found expression in their music. I once heard 
Martin Hayes recount stories of his boyhood watching tough, gruff men play music in his father's kitchen, music that was sweet and gentle and in contrast to the rough exterior of the men playing it. What joined these men was not the music so much as their shared sacrifice and vocation, their sense of tragedy, struggle, faith and joy, all of which came out in their music. Bluegrass music in this country has a similar origin.
You can lose the shared sacrifice and faith but keep the music, but when you do you have lost its substance and have hold of something essentially trivial. It is no longer an expression of a deep human friendship but a sort of lightweight end in itself. Fun, sure, but beware trying to attach anything meaningful to it:
At the same time, there’s been damage done in the course of this whole 
debate, some of it by me. And I’m not sure what can be done about it. I 
certainly lost my friend Jim along the way. Some come here to fiddle and dance, I remember he used to sing. Some come here to tarry. / Some come here to prattle and prance. / I come here to marry. You remember how it goes. “Shady Grove,” the song is called. A bit of old-timey Americana, the stuff we all still share.
Sorry, Joseph, what that song is singing we no longer share and haven't for some time now. 
A
 few years ago, his friendship began to cool, bit by bit. You understand
 how it is: a little here, a little there, and last time I was through 
New York he didn’t even bother to answer my note suggesting we put 
together one of our low-rent urban hootenannies. The problem, our 
conversations had made pretty clear along the way, was that I am a 
Catholic, and Jim is gay.
Well, actually, gay isn’t the word he would 
use. I have what might be the worst ability to recognize sexual 
orientation on the planet, but no one needed sensitivity to guess Jim’s 
views. Not that he was campy or anything when I knew him, but he was 
always vocal about his sexuality, naming himself loudly to anyone nearby
 with words that polite society allows only in ironic use by gay men 
themselves.
Anyway, Jim gradually started to take our difference 
personally, growing increasingly angry first at the Catholic Church for 
its opposition to state-sanctioned same-sex marriage and then at 
Catholics themselves for belonging to such a church. His transformation 
didn’t come from any personal desire to marry—or, at least, from any 
desire he ever articulated or I could see.