Hypocrisy of American Society: LGBT Matrimony

I've been doing a lot of thinking about the subject of gay marriage. I recently heard the state of New York just passed a law accepting gay marriage. Some American citizens say that marriage is a sacred union between a man and a woman that should last a life time and should never be broken. But in reality, a lot of heterosexual people who say these things often take the sacred union bond for granted. The rate of divorce within heterosexuals is an alltime high. Also, some (not all) heterosexuals go into marriage for convience instead of love(and all people should marry for the reason of true love). Some (not all) heterosexuals in America have been married up to four times within their lives. The same people (not all people)that say marriage is a sacred bond between a man and a woman are the same ones that don't take marriage seriously. Some(not all)heterosexuals do not take their marriage vows seriously and lie in front of the ministers and preachers. How can some people say that marriage is a "sacred bond between a man and a woman" when some people are cheating on their spouses behind their backs? Is marriage really as "sacred" as those same people say it is? Those same people say that marriage is "sacred" in front of other people because it's convient for them (to look good).

http://www.nytimes.com/2011/06/25/nyregion/gay-marriage-approved-by-new-york-senate.html