Wisdom from the 'other' Times

From an editorial published by the Los Angeles Times:

We disagree with the notion that some people should dictate how others choose to live their lives. But religious conservatives are right, in a sense, to say that the reasons some people are gay should have no bearing on their rights. Whether someone is born gay or somehow chooses to be gay, gay rights stem from a consenting adult's inherent freedom to live as he or she sees fit, without harming others.

From the Declaration of Independence:

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.

So, what's the argument?