Do you dispute that free movement of labor and capital are traditionally bedrock principles of conservatism?
Capitalism is the at the very core of conservatism.
But at what point during the effort to ensure capitalism do we wind up hindering it? When we accept foreign labor (or illegal) over American labor, in favor of paying them cheaper wages, you favor one form of capital over another. If Americans aren't working and paying into the economy, or contributing their capital to such, that's not "free movement of labor and capital" as you put it, since foreigners and their capital are the only things actually moving.
There is no "comparative advantage" given you are favoring one type of commodity from another country (foreign labor and capital), at the expense of American commodities (American labor and capital).
Also, it seems we are the only ones right now exporting labor along with other things, if so involuntarily. Wouldn't that mean we're giving other countries an "absolute advantage"?
You can redefine "conservative" to mean "statist" all you want.
Your mistake is thinking I'm trying to redefine anything as anything else. I don't force my interpretations of reality onto other people, unlike you.