You remind me of 10 year olds prank calling saying "OMG U SUK" then hanging up, make it subtle, don't use an accent, pick something simple like religion and slowly work up to sounding like an insane extremist.
"Perfectly understandable fears".
Whatever you do don't mention BOS because it will make the raid a complete FAIL and LAME, don't do faggoty shout outs.