I feel this argument is all formed from a matter of perspective. I've spent the majority of my life as a legal immigrant in countries that have zero problem with legal immigration, in order to escape living in countries with gigantic illegal immigration problems. This obviously means everyone is vetted, and is mostly treat with respect, as a part of the local work force, a student or a tourist or spousal visa, that needs to be approved. I understand due process is important but so is the same due process on entry. Hence the problems that other countries don't have.