Two Questions
If a (completed and guarded) wall on the United States - Mexican border actually forced people to identify themselves (photograph, fingerprint, answer questions, show passports or visas), disclose their belongings (subject to search and seizure), pay a duty (a tax) on imported goods, and limit their stay in the country they are visiting,
would this infuriate people because they do not wish to be subject to the laws the rest of the citizens are subject to when crossing boarders?
would this infuriate politicians because they could no longer have a steady influx of people voting to keep them elected at the cost of failing to curb illegal immigration, curb human trafficking, curb drug smuggling, curb terrorism, and curb social welfare cost increases?
Current functioning and proposed walls between countries (Wikipedia - Border Walls)
Belize/Guatemala Belize, Proposed, Disputed territory and anti-illegal immigration Botswana/Zimbabwe Botswana and Zimbabwe, 2003, 500km, Anti-illegal immigration Brunei/Limbang Brunei and Limbang, 2005, 20km, Anti-illegal immigration Bulgaria/Turkey Bulgaria, 2014, 30km, Anti-illegal immigration
Ceuta border fence, Spain, 2018, Anti-illegal immigration
Costa Rica/Nicaragua, Costa Rica, Proposed, Anti-illegal immigration
Chinese/Korean border fence, China/NorthKorea, Under construction, Anti-illegal immigration
Egypt/Gaza barrier, Egypt, 1979, subterranean barrier under construction, 3.1km, Anti-terrorism and anti-illegal immigration
Estonia/Russia border fence, Estonia and Russia, Planned, 106–108km, Against Russian intrusion, illegal trade, and illegal immigration
Macedonia/Greece barrier, Macedonia, 2015, 30km, Anti-illegal immigration
Malaysia/Thailand border, Thailand and Malaysia, Proposed, 650km, Anti-terrorism Melilla border fence, Spain, 1998, 11km, Anti-illegal immigration,
Hungary/Serbia barrier, Hungary, 2015, 175km, Anti-illegal immigration
Hungary/Croatia barrier, Hungary, 2015, 41km, Anti-illegal immigration
India/Bangladesh barrier, India, Under construction, 3268km, Anti-illegal immigration
India/Myanmar barrier, India, Under construction, 1624km, Anti-drug smuggling and anti-terrorism
Indian/Kashmir barrier, India, 2004, 550km, Anti-terrorism (disputed territory)
Iran/Pakistan barrier, Iran and Pakistan, Under construction, 700km, Anti-drug smuggling
Kazakhstan/Uzbekistan barrier, Kazakhstan and Uzbekistan, 2006, 45km, Anti-drug smuggling
Korean Demilitarized Zone, North Korea - South Korea, 1953, 248km, Conflict zone
Kruger National Park, South Africa and Mozambique, 1975, 120km, Anti-illegal immigration
South Africa/Zimbabwe Border, South Africa, 2000s, 225km, Anti-illegal immigration, anti-drug smuggling, anti-weapon smuggling
Kuwait/Iraq barrier, Kuwait and Iraq, 1991, 193km, Conflict zone
Pakistan/Afghanistan barrier, Pakistan, Under construction, 2400km, Anti-terrorism, anti-illegal immigration, anti-drug smuggling
Saudi/Yemen barrier, Saudi Arabia and Yemen, 2004, 75km, Anti-illegal immigration
Saudi/Iraq barrier, Saudi Arabia and Iraq, 2014, 900km, Anti-illegal immigration and conflict zone
Slovenia/Croatia barrier, Slovenia, Under construction, Anti-illegal immigration
Turkey/Syria border barrier, Turkey, Under construction, 828km, Anti-terrorism, anti-illegal immigration, and smuggling
Turkey/Iran border barrier, Turkey, Under construction, 144km, Anti-terrorism, anti-illegal immigration, and smuggling
Turkmen/Uzbekistan barrier, Turkmenistan and Uzbekistan, 2001, 1700km, Anti-illegal immigration
Ukraine/Russia barrier, Ukraine and Russia, Under construction, 2000km, Anti-weapon, smuggling, and conflict zone
United Arab Emirates/Oman barrier, United Arab Emirates and Oman, Under construction, 410km, Anti-illegal immigration
Mexico/United States barrier, United States, Proposed, Partially Constructed, 930km, Anti-illegal immigration and smuggling
Uzbek/Afghanistan barrier, Uzbekistan and Afghanistan, 2001, 209km, Anti-illegal immigration
Uzbek/Kyrgyzstan barrier, Uzbekistan and Kyrgyzstan, 1999, 870km, Conflict zone