Sarah Hoyt has written about what close-minded bastards most publishers are;

if you thought she was exaggerating, go read this.  A taste:
But despite that, there is something about my experience among New York’s literati that’s left a bad taste in my mouth. For all the predictable speechifying about “diversity” that I heard at cocktail parties and literary events, I became struck by just how politically monolithic this scene really is. It’s not just that writers and editors have to be PC when it comes to their books and their public pronouncements: There also seems to be a crushing uniformity in regard to their privately held viewpoints.
To put it mildly.