Iraq and immigration have one thing in common. Both are founded on the assumption that national political philosophies can be universally applied to any population with the same results.
The same leftists and radical libertarians who mocked the idea that Iraqis could be successfully transformed through democracy insist millions of illegal aliens from countries every bit as violent and unstable as Iraq can be successfully transformed by giving them legal status and the vote.
Both assumptions were and are wrong. They are both symptoms of an internationalism that assumes a favorite political philosophy that works in the United States can be applied internationally without regard for culture. And internationalism invariably undermines the nation by prioritizing an ideology over the rights and interests of the citizenry.