Graphs show the effectiveness of border walls in Israel and Hungary

Kush Desai:

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Israel’s initially lax policy towards migrants changed following political and socialbacklash at growing flows of (mostly male) foreigners entering, living and working in the country. Following a near half-decade long push, construction on a wall on Israel’s southern border began in late 2010.

After the wall finished construction in early 2013, illegal immigration almost immediately grinded to a halt.

There were a total of 42 attempted or successful illegal border crossings in 2014, a year after the wall’s completion – down 99.5 percent from over 10,000 in 2012, a year before the wall’s completion.

Hungary experienced a similar problem with unwanted migration beginning in 2014.
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Public Hungarian Police data of migrant flows only stretch back to January 2015 when the refugee crisis was already underway, but the data demonstrate a clear trend of surging migration after March 2015.

In June 2015, the Hungarian Government announced it would erect a barrier along its southern border with Serbia. The border barrier finished construction in September 2015. It was extended to seal Hungary’s southwestern border with Croatia in October 2015.

Migration flows decreased significantly as a result of the border barrier system.
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There is more.

It seems clear that Democrats really oppose walls because they work and not because they do not.  They want illegal migration to create a dependency class to replace their shrinking base.