Most modern Conservatives agree that our borders need to be secured, including against illegal immigration.  This need is based on national security imperatives, recognition of the need to preserve the integrity of our being a nation of laws, and not a nation of personal convenience, and our need to foster an environment of respect for law.  This also is based on the right of any nation—the right of any society in their social compact—to determine for themselves who they will allow into their nation: no foreign entity has an inherent right to enter another nation without that nation’s permission.  I won’t pursue the matter of secure borders further.  However, this is only part of the immigration problem that any nation faces.