Basic common sense does not need anything but an IQ above 50.
If I build a fence around my back yard it will be far easier to control who comes and goes than if I were to build a fence around the entire city I live in.
You have a back yard?
FACT: 31.4% of housing in the United States is multifamily, which includes apartment buildings, condos, townhouses, and mixed-use developments. This means that about 43.9 million residences are multifamily.
Renters headed 36% of U.S. households in 2019. Young people, racial and ethnic minorities, and those with lower incomes are more likely to rent.
www.pewresearch.org
FACT: Assuming you have A 590 linear fee fence: $13,570.
So based on these "common sense" FACTS...
less than 1/3rd of housing, fencing is not possible and if you have 590 linear feet fence to construct cost $13,570.
FACTS... are the reason for securing "borders" of countries. Securing like Russia did to keep people in or as USA and other countries do to keep people out!
Supporting FACTS:
There are now 77 major or significant Walls built around the world, with
45 countries planning or building Walls. Over 800 miles of Walls have been built in Europe since only 2015. They have all been recognized as close to 100% successful. Stop the Crime at our Southern Border!
The number of border walls globally has multiplied at a rapid clip, from fewer than five at the end of World War II to more than six dozen now, with more under construction. Most of the world's border fortifications have been built since the turn of the millennium, and are intended to accomplish...
www.migrationpolicy.org
YOU are a rarity among people of countries like USA, i.e. are against borders. Please publish your address so the bad guys know
your home! Ha...Ha... Ha...