How so? By his intention to redefine the institution of marriage by repealing the Defense of Marriage Act and establish a marital type status under the guise of domestic partnerships.
He also made his purpose clear when he said:
You will see a time in which we as a nation finally recognize relationships between two men or two women as just as real and admirable as relationships between a man and a woman.What he is saying is there really is no difference between the two types of relationships. His view is not only morally wrong but factually wrong from both a health and societal perspective.
I'd be interested in what he grounds his view in. What ethical system he looks to? It's certainly not found in the moral tenets of Christianity or any other major religious system. Nor in the natural law rooted in the nature God has given to us.
Both Christianity and the natural law clearly reject the view that homosexual relationships are on par with those between a man and a woman. From just a biological and health perspective, homosexual behavior violates our natures and what's healthy for the human person.
Obama also sought to invoke God's blessing when he said, "Thank you for the work you're doing. God bless you. God bless America."
It's also very postmodern, e.g. relativistic that the president would seek to invoke the blessing of God on our nation and those actively seeking to overturn God's moral standards while at the same time stating it's his goal to reject God's standards in practice.
The President would do well to read and take to heart the words of the prophet Isaiah 5:20 "Woe to those who call evil good and good evil, who put darkness for light and light for darkness, who put bitter for sweet and sweet for bitter! Woe to those who are wise in their own eyes, and shrewd in their own sight!"