Traditional views on marriage are the foundation of society, and they predate things like laws and liberal activist judges. Just ask these village leaders in rural India:
If we let a man marry a man, then maybe a girl from a lower caste will marry a man from a higher caste, and then a man will want to marry his sister. Where will it end??!?!?
... I just can't wait to find out what time period we are in on the show because it could be 2004 or 2007 or 2010 or maybe even a different time later but then again it might also a be parallel or maybe a perpendicular universe and maybe the two universes or times will come together as one and we can see all the same characters again and we will find out if Jack still loves Kate and if Juliet still loves Sawyer and if Farraday still wears skinny ties because even though Farraday died they might have changed the future when they changed the past which means the present and past we have presently been watching all along now exist in the past of a different dimension ...