Don't believe in gay marriage...don't go to a gay wedding, don't have a gay marriage.
Don't do business with a gay person. Don't bake them wedding cakes, officiate at ceremonies take their picture, paint their portrait, counsel them or rent to them. Don't let your children associate with their children, don't go to their homes, don't invite them to parties. Don't hire them, don't befriend them, let them live their lives as they wish and you live yours as you wish.
Now we have freedom.
All except the no hire part...you are not free to discriminate as an employer.
Employers do it all the time. They are just getting more creative at discriminating.