Hit the system with a tidal wave of demands it couldn’t refuse, and couldn’t possibly fulfill.
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Back in the Sixties, Marxists Richard Cloward and Frances Fox Piven came up with a great strategy for overloading and collapsing democratic welfare states, paving the way for socialist tyranny. Basically, the idea was to hit the system with a tidal wave of demands it couldn’t refuse, and couldn’t possibly fulfill.

There’s nothing complicated about what is happening here. Barack Obama invited these people to send their children to the United States as refugees. He’s already made illegal use of executive orders to gut the immigration system; he’s talking about doing it again, and the people of South and Central America can hear him just fine.