This a stupid statement thats NEVER been TRUE. No one state has ever existed in utopia its own vacume without immigrants. its a complete falasy without any basis in reality, much like religion, its pushed by the conservatives as a way to maintain repression.
ICE is just a continuation of slavery. If Central/South Americans didnt continue to be leveraged by EVERYONE in the economy then there would be no american dream for them quest over the boarder for.
Countries are defined by their borders, and governments are perfectly justified in using force to control access to their territory. The fact that there is a pathological unwillingness in some industries to comply with immigration law (in collaboration with some politicians and administrators) and a willingness to externalise the costs of their "cheap" labor might have given you the impression that this state of affairs was inevitable or necessary, but it is just a mechanism for corrupt businessmen and opportunistic politicians to gain monetary and political advantage at the expense of citizens, as well as technological progress (an endless supply of unskilled and semi-skilled labor below the market rate removes the incentive to invest and innovate). Factors like birthright citizenship and chain migration further exacerbate these problems.
ICE is just a continuation of slavery. If Central/South Americans didnt continue to be leveraged by EVERYONE in the economy then there would be no american dream for them quest over the boarder for.