As to history are you arguing that in resewn civilization the general normal was not hetero man and woman husband and wife?
In recent European history, yes. But you made a much more extravagant claim. And "norms" are not exclusive truths. Nothing concerning homosexuals will ever be the "norm", because we constitute a numerical minority in every society. Minorities never define norms, unless they are rich as hell. But that doesn't mean society can't adapt to our presence, and indeed we have been integrated into society at many times in places through human history. There's an avalanche of difference between saying "most women marry men" and "all women should be forced to marry men".
In Europe, socially conservative Christians have held a lot of power for a long time, partly because people like you give it to them unthinkingly, but mostly because very powerful people found it useful to force their agenda on the populace. Homosexuality is
not a new invention, nor is gay marriage whatever you choose to call it. The upper classes have always tolerated it among their number to a certain degree (Henry V wasn't gay, but his 2nd great-grandfather Edward II certainly was, and Hugh Despenser was referred to as his husband even in documents of the time), but the working classes are needed for their labor, so in the Feudal Era and afterward it was very important to keep them breeding. The church and the state were convenient allies with each other in producing the agenda of constant fecundity and the brutal disintegration of female autonomy in European culture. A project which was never fully embraced by the population, as there was always rebellion and dissension surrounding these issues.
But we don't need an ever-growing slave class any more, anyway. Indeed, over-population has become a major global crisis in many places. So why are you still pushing archaic social agendas?
I know you say you aren't, but if you aren't trying to support conservative bullshit, why are you parroting their apologetic arguments and false portrayal of history into this debate? They're wrong, and you're wrong.
If you don't believe these things, or just don't like being taken for a conservative shill, then think
before you post next time.