Andy and Fred are correct that in theory since illegal immigrants are indeed illegally in a certain country that they do not share the benefit of that nation's laws.
However, that really does nothing to address the issue. It also doesn't stop international organizations from trying to enforce human rights law, as they would for a refugee or exiled person which exist in an almost similarly exact plight.
Anywho, I think we all know the answer to the immigration issue. And it doesn't include building great walls or mass executions in the
Arizona desert.