Having failed to make their intended satire clear to the George Washington University campus, seven students felt the need to come forward late last night to take responsibility for those “anti-Muslim” posters we told you about yesterday. The Hatchet published parts of the letter after receiving it last night. Among the seven students who admitted their involvement was ubiquitous IVAW poster boy and current GWU graduate student Adam Kokesh. “It is to our great dismay…