Just because this particular forum is Christian does not effect the rules that apply in the realm of the actual world. I feel that our argument is going in circles so I'm going to try taking a different route.
-Do you think that due to your religious rules same-sex marriage should be banned?
-Do you think that everyone should have to abide by your religious rules?
Given that I have spent a good deal in trying to spell out a reasoning and you're continuing on false premises followed by Begging the Question with loaded questions, I'll either have to let someone else attempt to lay out what was posted or I'll have to come back to this if I have a lot of free time.
But just to address your two questions:
1) In the religious context - it is banned, but then there is typically always some that are not obedient to God.
In the society sense - my state's constitution doesn't say anything about banning. It doesn't even mention same-gender couples. It states a man and a woman. Your objection that this doesn't meet your standards of inclusion for same-gender, polygamy and any other model not matching is simply dissent for having a definition of marriage.
2) I think people
should, but there is nothing supporting your inserted premise of "should have to".
In the religious - it was a loaded question begged that was supposed to imply support for your position. However, it is irrelevant in that it doesn't address facts.
For example: Show me presently where in the U.S. Christians incarcerate two same-gender people gathering friends together to have a ceremony and exchange vows and may you will have something.
In the social - there have been states with Christian citizens that have same-gender civil unions or marriage (misnomer).