NEW DELHI – As the principal of an Islamic seminary in New Delhi, Maulvi Mohammad Mouzzam Ahmed knows there is no such thing as a free lunch. So when he was offered an all-expenses-paid trip to the United States a few months ago, to see how religious schools operate there, he was curious, and a little skeptical. What, he wondered, would the world's greatest superpower want with a nice moderate Muslim like him? The maulvi was not alone. He was just one of a half-dozen Indian Muslim clerics invited to the United States in September as part of the US...