I've just stated one, i.e., the government should not promote homosexual activity, which many citizens believe and have a right to believe is immoral. And you just stated another -- unelected judges should not conduct this sort of radical social change without a clear and firm basis in the Constitution.
Oh really, here is the last part of your previous statement.
The government should at most remain neutral, not promote homosexual activity and demonize those who believe otherwise.
How can government remain 'neutral' with a marriage amendment that denies one group rights that another group enjoys. There is a level of hypocrisy that cannot be ignored.
Now could you please state some positive reasons from a marriage amendment.