@Foxfyre,
Foxfyre wrote:Open borders in the USA means that anybody who enters the country is entitled to the same protection, privileges, and services of everybody else whether or not they contribute anything to provide those services. Therefore every peson who avails himself/herself of public services and entitlements is making a de facto slave of those who pay for those services and entitlements. That is not the only reason, but it is one compelling reason for the USA to control who is and is not in the country legally.
You might have a point there, but it has absolutely nothing to do with Classical Liberalism.
Classical Liberalism advocates limited government and minimal interference in people's lives. On this side of the equation you'd therefore have very limited government services, protection or privileges.
On the other hand, Classical Liberalism propagates individual freedom, free markets, freedom to move and freedom to conduct business. As long as a person has peaceful intentions, there are no reasons why he should be disallowed to move between countries.
Now, if you're not an adherent of Classical Liberalism, it might make sense to advocate a more generous social safety net - including welfare, unemployment benefit, homeless shelters or universal healthcare - and simultaneously favour certain restrictions on the freedom to move between countries in order to avoid exploitation of the services provided by those who never contributed to those services.
However, if you advocate limited government, low taxes and elimination of all those "entitlement programs" while simultaneously propagating drastic restrictions on people's freedom to move, then you certainly don't fall into the category of Classical Liberals or libertarians.
Foxfyre wrote:If Israel opens its borders, hostile Arabs will quickly outnumber and overwhelm the tiny Jewish population.
I don't know how you would empirically show how many Arabs are hostile to Israel. But apart from that - following the ideals of Classical Liberalism - there should be no reason at all to restrict the movement of Arabs that are
not hostile to Israel.