Not only do I think this is a foolish notion, look at what immigration has done to the United States. We let in people from all nations and cultures, including those who despise us or, if not that, they despise our government. They see nothing special about the U.S. Constitution and are not particularly wedded to our Bill of Rights. In many of their countries, there are limitations on the freedom of speech to protect certain state religions or royalty; thus, they are not avid proponents of the First Amendment. Also, in many of their countries, only the police and military are permitted the use of firearms; so they actually oppose the Second Amendment and vote for gun registration and other oppressive gun controls going all the way up to the complete abolition of private firearms ownership.
We've also destroyed our way of life by letting people who are too young and who lack wisdom vote. Many U.S. citizens don't pay taxes, and if a republic is to survive, only those who own property and pay into the system should be able to vote. Those on the public dole should not be allowed to vote, nor should those who can't answer basic questions on who George Washington, Thomas Jefferson and the current vice president or speaker of the House are, and cannot produce valid identification be able to vote. And 26 should be the minimum age people are allowed to vote.
In other words, the borders should be tightened in most instances, not relaxed. Israel, for example, wouldn't last very long with open borders. The poor would flood into the lands of the wealthy and instead of the people of those nations pulling them up, they would pull the people of those nations down. And finally, most peoples don't mix well because of serious political, religious and philosophical differences. This is natural and, to me, not a bad thing. When I was 21 years of age, people knew about the Constitution and recognized a Marxist when they saw one. Now they see a Marxist and don't even know he's a socialist!
So them's my views. Take 'em or leave 'em. It's too late for the USA. We've sunk too low. As one great man said, "When a people lose the Spirit of God, they lose the ability to act in their own self-interests." This has clearly happened to us as we pile up trillions of dollars in debt and very few seem to be experiencing any alarm. We're told of possible solar or EMP attacks that could knock out our power grids and send us all back to the 1800s in just a few seconds. Has anyone proposed to fix this? Nope.
Again, eradicating borders would erupt the world in war and destruction. "Diversity" is not a scriptural virtue, but a modern liberal progressive characteristic we all must all receive mandatory training is.
Poppycock!!