A response is mandatory. Border incursions by violent drug smugglers, terrorists, and other criminals are the primary issue here.
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Even if these people are non-violent, the very act of entering a nation without permission is illegal. Done in large numbers it is akin to an invasion. If nations cannot enforce their borders, then they are not nations. Left-wingers may hypothetically like to live in that world, but that is because they have not adequately thought about (or experienced) the consequences of “no” nations”.
“Left-wingers may hypothetically like to live in that world, but that is because they have not adequately thought about (or experienced) the consequences”
The leftwing politicians sell their socialism by demonizing the “rich” (which they are themselves) and promoting class warfare. They advocate taking from the rich to give to the poor.
What the average leftwing voters fails to realize is that, by world standards, THEY are the rich. Half the world lives on $2 / day. Open borders means taking money and resources from the “rich” $10 / hour or $15 / hour worker, to give their earnings to the poor of the world.
Of course, it will always be necessary to have rich, elite Democrats to fairly administer this transfer of wealth.