You know what else was 'tradition'? The mass murder of Jews in pogroms. Intense xenophobia and racism. Religious wars and genocide. Child abuse and slavery. Women being treated as property. Rape being a normal part of life.

The barbaric, illogical, and uncivilised hatreds of the past aren't suddenly sacred and inviolable just because you wrapped a pretty name around it.

Marriage as a tradition is not under threat by LGBT rights. It's strengthened by being an act of love, not by being an act of persecution. What is threatened by LGBT rights are the pointless hatreds that have destroyed millions of lives over the centuries, and that 'tradition' of fear and hate is not something we need to carry around.