Real hard to make the case it's a "Sacred Rite" when these ministers seem to be running a resort-town wedding chapel with no religious affiliation.
I was married in a similar chapel in a similar location and I'm not going to tell anyone it was a religious ceremony, although religious elements were mentioned.
This does make for a weak spot for attacking Christians, and we know that those who hate Christ will try to do it.
It should be a warning to firm up their faith and how they live it. A Christianity that asks the world to fill in the blanks does not have much room to complain when the blanks are filled in evilly.