"Government should treat all citizens impartially, without regard to wealth, race, ethnicity, disability, religion, sex, political affiliation or national origin. We oppose all forms of invidious discrimination. Sexual orientation is not an appropriate category," – an open declaration of the need for the government to discriminate against its gay citizens, in North Carolina's GOP party platform.
You are already free to fire someone just because they are gay in North Carolina. But the active embrace of such discrimination, just like the recent constitutional amendment, rubs it in with twice the rawness.