The whole point of the joke was that the Uk is being invaded by muslims, did you not read it?
I think decent muslims have to alot more to worry about right now then an old joke posted on a cigar forum.
Ive heard many versions of it referring to Pakistanis/Carribeans/Africans etc etc.
Its just a bad joke.
No need to get stressed about it.
Weekend is nearly here......