I've been musing about why legalisation of same sex marriage seems to matter so much, even when it is in a foreign country. Even if you don't happen to know anyone who wants to marry a same sex partner in that country. I mean of course it matters from an impartial point of view. Thousands of people will be made a great deal happier by SCOTUS's decision. Even if I don't know them, that should make me happy. But my joy at this legislation seems different somehow. It seems personal.
I think the answer is at least partly what the legislation says. If gay marriage is not recognised in the United States, then that is a great big country which says through its laws that the love of some people is worth less than the love of others. That the value of your marriage with depends on whether you and your partner have matching genitals match (or rather non-matching genitals). That is personally insulting even if you don't know anyone in that country who wants to get married and can't.