Thoughts on North Carolina: "How to win a culture war and lose a generation"

Here is a pretty darn sensible blog post about the recent uproar about North Carolina's voting to amend its state constitution.  Here's a piece of it:

Despite the fact that the North Carolina law already holds that marriage in the eyes of state is only between a man and a woman, an amendment was put on the ballot to permanently ban same-sex marriage in the state constitution. The initiative doesn’t appear to change anything on a practical level, (though some are saying it may have unintended negative consequences on heterosexual relationships), but seems to serve primarily as an ideological statement. 

... an expensive, destructive, and impractical ideological statement.  

... it should be clear that amendments like these needlessly offend gays and lesbians, damage the reputation of Christians, and further alienate young adults—both Christians and non-Christian—from the Church.  

So my question for those evangelicals leading the charge in the culture wars is this: Is it worth it? 

Besides, I don't like the idea of tampering with constitutions, period.  Also a side effect of culture wars: everybody comes out looking and feeling worse, and everybody comes out more radicalized in one direction or the other - and this makes everything even worse than they were in the beginning.