RIP

Peter Gadiel, a Kent, Connecticut native, died on September 11th while working on the 103rd floor of the World Trade Center. Now his hometown wants to erect a memorial for him near the town hall. Deliberations hit a roadblock, however, with insistence by Peter’s father that any memorial to his son include the phrase “murdered by Muslim terrorists”. He wants to ensure that people remember exactly how, and by whose hands, his son died.
Is the inclusion of such material necessary to ensure the historical accuracy of the events of September 11th ? Or do such words incite further discrimination? Should the memorial include this phrase?