Nonsense, the word monopoly refers to business and the lack of competition. The subject here is simply recognition of what IS!
"It's view is unjust and limited and it recognizes no other authority or view in the matter. In other words, monopoly."
The unique and supermajority nature of the concept of one man, one woman that defines the fundamental aspect of marriage makes it an authority on the matter. The word and it's concept belong to the individuals in that group. All others can eat sand.
"Changing the subject, eh?"
You brought up other cultures. I did notice that you failed to note any that had homo marriages, or allowed them, or any variation of marriage with other speceis, or things. This is about the American culture and the ideas and concepts we hold.
I'd be just as irritated if the US govm't, by virtue of chance election of a majority of perverts(dem), or by judicial fiat, changed, or modified the definition of energy to fit their idiot purposes. Perversion of an accurate description of reality is evil, as per, "thou shalt not lie".