I'd don't recall advocating the elimination of federal govt. There are some things it does and needs to do. Defending the country is one. The funny thing is, one of the most detestable 'planks' of the Libertarian Party is its desire for open borders.
Open borders are the de facto situation with Republicans in control of government. We're accepting LP attributes because we're 'stuck with it.' Just don't try to tell us it's Conservative, though.
There just are not enough of people on board with closing or more tightly regulating the borders. I dont know how bad it will have to get for that to change.