Imagine the message this sends to democracy activists in Iran and around the world. It says that the tyrants who victimize them at home can simply go to America, shed the militant garb, get a close shave, and recycle themselves as respectable scholars. The case of Hossein Derakhshan also shows how blanket immigration decisions about a place like Iran can be both ineffective and deeply flawed.

Source here. 

A radical anti-American gets waved in. On the other hand, Iranian Christians, Baha’is, Jews, gays, and democratic activists are banned from entering.