From Atran and Axelrod's Edge essay:
In the course of this work and in our discussions with decision makers in the Middle East and elsewhere we have seen how informal meetings and exchanges of knowledge have borne fruit. It's not that religious, academic or scientific credentials automatically convey trust, but when combined with a personal commitment to peace, they often carry weight beyond mere opinion or desire.Edge 321 -- July 8, 2010 (Edge.org)
So we find it disappointing that the Supreme Court, in Holder vs. Humanitarian Law Project, ruled that any "material support" of a foreign terrorist group, including talking to terrorists or the communication of expert knowledge and scientific information, helps lend "legitimacy" to the organization. Sometimes, undoubtedly, that is the case. But American law has to find a way to make a clear distinction between illegal material support and legal actions that involve talking with terrorists privately in the hopes of reducing global terrorism and promoting national security.