A citizen of India, Rajendrasinh B. Makwana attempted to sabotage the computer database at Fannie Mae. He was, according to news reports, employed as a so-called temporary foreign worker who had been authorized to work in the United States temporarily under the provisions of the H1B visa that had been issued to him. Here’s how this appalling situation can be summed up: This is the real threat to society, not the sinking of Fannie Mae. But the strange case of Makwana does bring up a number of issues. The main one is the use of H1B visa workers – and...