Marriage isn't anything like as important as it used to be. The laws protecting couples living together reflects this in most secular countries .
Marriage is as important as you want it to be, and it can mean whatever you want it to mean. It is subjective.
Let's not forget that Marriage existed long before any of today's common religions were a brain fart and that bonding and spending the rest of your life with one mate isn't something unique to just humans.
In many acient cultures, all that was needed to establish a marriage was each partner to express their total devotion to one another and that was pretty much it. There were no rules besides that, there was no routine ceremoney to go through, no rings, no priests or justices of the peace saying yay or nay that your marriage is valid..... heck parental approval wasn't even required in some cultures.
Eventually religions came along and took "Marriage" as their own. In early Christianity, it was determined that the church had no business in the personal affairs and relationships of it's followers...... but eventually it took it over, set up all sorts of rules and regulations, certain procedures, etc. to follow and that it all had to be done through the church or else it wasn't a real marriage.
The meaning of marriage is very subjective these days.... with many different cultures, religions, countries, laws, courts, individuals, families, etc. all having their take on what a marriage really is.
I know what it means to me.... and even though I do not follow any paticular trend religion today.... marriage does mean something.
But historical records state that Marriage itself is not "Owned" by one religion or another, thus they should have no right in determining who can marry who and why in the eyes of the law.
In your (generally speaking "your") own church community, sure..... someone breaks your views of Marriage, boot em out or sin their arse to hell..... but when it comes to trying to dictate to everybody else who doesn't follow your religion on how marriage should be, there is no justification, because they don't own marriage.
If your religion or church doesn't want to marry interacial or gay couples, fine.... but don't go trying to force the laws to abide by your religious views, because the laws are to cover everybody equally, no matter what their beliefs or sexual orintation are. If the courts and justices of the peace want to marry gays and interacial relationships, then they should..... they don't harm anybody except those in the relationship.... and that risk isn't any worse or better then any other couple out there.