I see same sex marriage as adding a standard of segregation, a new form of gender apartheid marriage. I see same sex marriage as anti-gay because every gay was born of male/female union.You seem to be all rolled up in negative thought. You indicate that you think this is some form of attack on marriage. I see it as sharing access. Exclusion is a negative action. It isn't as if gays are wresting our marriages away from us. You have yet to show any harm that isn't contrived.
Exclusion is a positive action because we don't want unqualified people licensed to marry, fly passenger planes or performing surgical operations. Exclusion maintains standards.