This government is empowered only by We the People via the Constitution, so I don’t know what you mean. The document’s stated purposes are the legitimate purposes of this government.
And the sodomite agenda is destructive of every single clause of that statement of purpose.
I mean that our Constitutional form of government establishes the rule of law, not the rule of man. The Constitution, not your good ideas or my good ideas or some tyrant's ideas, is "the Law of the Land". Today, you may want to ignore the limitation of the constitutionally delegated enumerated powers of the federal government so they'll do what you want. But by doing so, you've just abandoned the rule of law (the Constitution) for the rule of man. That's the first step down the slippery slope to tyranny. You've given the Federal government the OK to go beyond it's Constitutional boundaries and limitations. Today maybe it works for you and your values. Tomorrow it works for those who hate you and your values. And without the constraint of the Constitutional rule of law, the history of man shows that tyranny and loss of individual liberty (including loss of life and freedom to pursue your dreams) is right around the corner.
You and the the people of your state are free to deal with the sodomite agenda however you want. And states are doing (or trying to do) just that without unconstitutional interference from the federal government.
Your confusing the Constitution with the government it creates. They are not one and the same. The Constitution IS your friend. It is actually an anti-government document that creates and at the same time severely limits the powers of the federal government. The U.S. Constitution is based on the principles spelled out in the Declaration of Independence that our rights are derived from God not from man or his government. This is one of the key distinctions between the Constitution and the government it created. Government never recognizes your God-given rights and liberties unless it's forced to and the Constitution forces it to do just that. The history of America is a story of how long and hard government has worked to take away your liberties and amass more and more power to itself. Government is always a taker. It will try to take as much power and money from you as it can.
The Constitution is a recognition of the need for a limited federal government to unify and protect America mainly from foreign governments. But as I said, your protector is very capable of being you oppressor. The Constitution is the only legal bulwark in America between your freedoms and a federal government that would love to gain more power by abridging your freedoms.