I would suggest an introductory statement about the meaning of the song, with the statement that ethnic/religious intolerance is a terrible problem worldwide, and "let 'em have it!"
    befroe the performance, give them a web address or name or phone number for more information. I do this all the time when I do presentations for disability or pro-life issues; it gives those in the audience a resource to follow-up, if they are curious.
    If the local host will allow it, have some kind of brochure or copies of the resource materials there.
    make em' squirm!!!! and, have a blast!!!!
    Wilco in tennessee