That is what you think should be the case,not historical reality. Polygamy is extremely common in human societies, and de facto polygamy has existed since the beginning of western civilization. That you think the modern "nuclear family" model is the "traditional" family just shows how little you know about how people lived in the past.The modern Western family is the exception to the rule, not the rule.
What I don't understand is, if two gay people want to get married, why does that offend you so much? How is it any skin off your nose?
I am not a multi-culturalist. I believe some cultures are superior to others. They are usually better due to better choices. I believe Western civilization has benefited greatly from moving to monogamous (heterosexual, it should go without saying) marriage.
What I don't understand is, if two gay people want to get married, why does that offend you so much? How is it any skin off your nose?
I do not mind if any combination of adults have a ceremony and call it, informally, marriage. It is zero skin off my nose.
What is skin off my nose is when judicial activists inject their own prejudices, rejecting centuries old traditions, and rule that the laws are wrong and must be changed.