Yes
Now the question is why does one group want to stop the other group from doing something. In this case I think there are a lot of reasons that a society should say no to homosexual marriage. The top reason from my perspective being God doesn't want any of us doing it, so society should not be promoting it.
I believe that God knows what we are going to do, including our sexual proclivities, even before He creates us. I don’t believe our sexual orientation matters much to Him.