It should be noted this is a recent phenomena.
Yah, it definitely varies in time, place and cultural context.
The vast majority of modern societies where male/male non-sexual affection is considered normal are incredibly intolerant of homosexuality
The vast majority of modern societies (full stop) are incredibly intolerant of homosexuality. The variance on human cultural diversity has been winnowed a lot; you don't see much like the Spartan or old Celtic norms today. Both colonialism and the spread of big, monotheistic conversion-focused religions probably have at least a bit to do with that (though the religion angle shouldn't be overemphasized either -- indigenous cultures that aren't violently subjected to conversion often come up with interesting syncretic adaptations -- the Minangkabau are polyandric, matrifocal, animist, intellectual-focused Muslim culture who were able to bring in Islam at their pace, on their terms).
Basically what I'm saying here is I don't think acceptance of male/male affection in general is a causal determinant of homophobia in culture, and that pragmatically, both problems need attention in this culture.
The vast majority of modern societies (full stop) are incredibly intolerant of homosexuality.
There are worlds of difference between Sweden and Turkey, let alone Sweden and Saudi Arabia.
Remember that while in some parts of the ancient world homosexual relations with young men or fellow fighters where tolerated or even idealized as a higher form of love than with women, men where generally still pressured to find wives and produce heirs with them. There where exceptions to this, but they where just that, exceptions. Homosexuals outside of the closet in th...
One of the lessons highlighted in the thread "Less Wrong NYC: Case Study of a Successful Rationalist Chapter" is Gender ratio matters.
There have recently been a number of articles addressing one social skills issue that might be affecting this, from the perspective of a geeky/sciencefiction community with similar attributes to LessWrong, and I want to link to these, not just so the people potentially causing problems get to read them, but also so everyone else knows the resource is there and has a name for the problem, which may facilitate wider discussion and make it easier for others to know when to point towards the resources those who would benefit by them.
However before I do, in the light of RedRobot's comment in the "Of Gender and Rationality" thread, I'd like to echo a sentiment from one of the articles, that people exhibiting this behaviour may be of any gender and may victimise upon any gender. And so, while it may be correlated with a particular gender, it is the behaviour that should be focused upon, and turning this thread into bashing of one gender (or defensiveness against perceived bashing) would be unhelpful.
Ok, disclaimers out of the way, here are the links:
Some of those raise deeper issues about rape culture and audience as enabler, but the TLDR summary is:
EDITED TO ADD:
Despite the way some of the links are framed as being addressed to creepers, this post is aimed at least as much at the community as a whole, intended to trigger a discussion on how the community should best go about handling such a problem once identified, with the TLDR being "set of restraints to place on someone who is burning the commons", rather that a complete description that guarantees that anyone who doesn't meet it isn't creepy. (Thank you to jsteinhardt for clearly verbalising the misinterpretation - for discussion see his reply to this post)