"Social Conservatives also tend to be the weakest along the spectrum of economic Conservatism and may also oppose free trade and immigration etc..."
There is nothing conservative about illegal immigration. In fact, I believe it's the national libertarian's position on illegals that makes them so disliked here, even by some libertarians.
I thought that social conservatism was in favor of government restrictions on personal freedoms and economic conservatism was in favor of financial and regulatory freedom, economics freedom. Combined, they equal conservatism, the ideological philosophy. If these definitions are correct then illegal immigration falls under the social conservative aspect of conservatism.