Love him or hate him, he hit the nail on the head with this one.
This quote -- taken from an article recently posted on the Human Events website -- sums it up perfectly (the emphasis is my own):
Giuliani understood the link between allowing people to urinate on the streets with impunity and New York Citys overall decline. Outside New York, on the Republican campaign trail, he is sure to meet many voters who understand that his positions on abortion and marriage do to our national culture exactly what the street people and pub crawlers did to New York.