I think that one of the reasons unpersons got so worked up is that she sees opposing gay marriage as an attack on her rights, and Flavus is implying/stating that standing up for those rights, perceived or otherwise, is ridiculous/childish/stupid.
I'll agree that her delivery could have been more subtle, but at the same time, in many ways hearing someone attack your rights (again, perceived or otherwise) with cold, calm detachment is actually worse than dealing with an inarticulate redneck... I can understand not caring about the issue, I can understand thinking it's a matter of state's rights, and I can understand supporting it-- what I can't understand is why anyone would be so adamantly against what is essentially a matter of social equality.
People often say that I can be very cold and detached about things. With me, that's how I present externally most of the time, but true to INFJ form, I feel things very strongly. (I wish my bosses realised that, but if they did, I suppose I would not have been promoted to where I am).
The things that have probably had the strongest impact on me in relation to my opposition to gay marriage are from experiences growing up:
I'm getting to my mid-thirties, so my experiences growing up are probably a generation before many people on this forum. Back then I lived on a street where just about every house had a family with two, or three kids in it. We would always play, fight, chase, etc. after school - all up and down the street. Our parents would also do stuff together occasionally - cook-outs, monster garage sales, etc. I went to a school with over 1000 students - and basically almost everyone was in the same situation.
Then one day - and it seems like something started to change quickly - one of my friends wasn't himself. Being an all boys school, you didn't really ask what was wrong, but tried to be more considerate or something like that. It turns out that his parents separated. He once let on that it seemed that his parents didn't care about him, or his brothers anymore - they were too wrapped up with their own concerns. After that another, and another classmate would start flunking exams, missing school, losing/putting on weight. There were also a couple of suicides of students. We were all in shock - no one had ever heard of divorce, except among Hollywood actors, and no one had ever heard of suicide. I think people started becoming paranoid that their parents might separate.
Fast forward to when I was already out of school. My nephew, whose IQ was tested as being 4 standard deviations above average flunked out of school and he's basically always told me that I was more a father to him, than my brother, because I was actually interested in him and not just in myself. He has been suicidal since his parents broke up more than 15 years ago. He has a step-father and step-brother, but what affected him was that his actual parents at some point stopped worrying about him, and about their own problems. The split up basically wrecked my brother too. Moreover, the younger players in my work basically fall into two categories: those who can handle set backs and those who can't. These also basically line up with those who grew up with both their natural parents, and those who didn't.
That's the background. Now for the relevance. I like reading philosophical works in my spare time - the more ancient, the better. If you read ancient historical commentaries, what stands out is that they noticed the same thing going on as described above. The philosophers, when speaking about marriage mostly come to one conclusion: the only reason marriage exists is because human children, unlike most animals, only really flourish when both parents are around to nurture/raise them for many years. Restated as purpose, they almost all say that marriage exists for the benefit of the offspring.
Relation to my position on gay marriage. I basically oppose anything which significantly overlooks, denies, negates, diminishes, etc. the connection between marriage and the bearing/raising/benefit of offspring. If people (most frequently the woman) want to get married but not have children - I ask 'why bother?' If gays want to marry, I ask 'what's the point?' If you're not wanting to raise your own children with their mother/father - why marry?
The objection is rightly made that it shouldn't affect a married couple with children, that other couples marry without wanting a family. However, when marriage is not seen as something connected with family life; or when it is not seen as life-long; or it is not seen as something serious; or whatever might denigrate, reduce, make light of, etc. is held in the popular psyche - it definitely does have an effect on the attitude of married couples with families. 20 years ago some people started to make light of marriage, saying that Elizabeth Taylor (actress) gets divorced all the time. Now everyone presumes that they might get divorced if married. People just don't have the same sense of need/sense of importance to try to change their outlook, hobbies, friends, habits, manners, priorities to fit in with another person in marriage. People in shopping centers don't even seem to have the sense that it is important not to argue in front of their children, let alone strangers. Basically a massive contradiction has worked its way into many people's understanding of marriage: that marriage is about me. (Or, marriage is about us -partners- exclusive of the children). Marriage, not so long ago, was definitely about raising a family.
So why should I be so passionate about this? Because my friend did not deserve to have his world turned upside down; because my classmate used to be happy and ended up committing suicide; because my nephew's life is screwed; because the younger guys I work with have been slugged with a disadvantage they did nothing to deserve. If exalting the importance and excellence of marriage, at the cost of some people's sense of linguistic liberty ("civil union: vs "marriage"), causes even one spouse somewhere to reign in his/her selfishness somewhat and some kid can grow up happy, it is worth it.
All of the debate and lobbying for everything that diminishes the connection of married life with family life is being carried out by adults, with their own interests and agendas. Those potentially disadvantaged by these decisions (and significantly disadvantaged) cannot vote, cannot participate in public political life, cannot lobby, cannot form media campaigns. Children worrying whether their parents care about them have no voice whatsoever in our political life. It is bogus to claim that because everyone was once a child, our considerations about gay marriage, or divorce, or welfare, etc. is considerate towards them. Children are not concerned about who they can, or cannot marry - they rightly are concerned about their own security. So every time someone says that they want some law about marriage changed, because they will feel more fulfilled, or happy, etc. I shut down. However, if someone says that laws about marriage should be changed because it might help children to feel more fulfilled, happy, etc. I listen with complete interest - if for no other reason than someone is saying something which is not completely selfish.