"Ban on gay marriage is unconstitutional. It's forcing one person religious beliefs on another.
Banning gay marriage is no different then banning a religion."
I don't believe in rights magically appearing to be constitutional where they never have been before. I believe that if they can magically appear, they can magically disappear using the exact same mechanism. Living in such a world might appeal to you but it does not appeal to me. In fact, it scares the bejeezus out of me.
"We aren't that heterogeneous any more.
Drive around the country. Same strip malls, same gas stations, people watch the same set of entertainment.
Hell, do to TV, regional accents aren't as strong as they used to be."
Of course we are. I've driven across the country numerous times and lived in several states. Without listing countless examples, I'll cite one. Red states vs. blue states. Different political and economic philosophies.
"Also, thats not why it was set up that way."
Of course it was. Read Federalist 10 and 28. Federalism was set up to aid in preventing tyranny (and thus a civil war) by keeping all power in a central government, as well as to allow various other ideals to be tested and tried. A central authority is not by definition "tyrannical", however when trying to apply the same laws on an entire heterogeneous population with different economic religious beliefs a central single authority will by definition become tyrannical. Example, forcing a business owner to serve a customer for a service of which he has a moral objection violates his religious rights while the customer's civil rights may viewed as being violated. How long until the one who's rights are being suppressed follow Jefferson's observations:
"That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness" -- Jefferson