For their next trick they'll show Bletchley Park, who's initial research was of course based upon Polish notes and a stolen enigma machine smuggled out of the country as Warsaw fell.
(The famous U571 incident of the Americans capturing an engima machine [insert lolz for those who know the history behind the film] was for the naval 4 wheeled version, the Wehrmacht used a 3 wheeled machine with much of the early cracking work having been done by Polish intelligence).
Or maybe for their next trick they'll show how the Polish immigrant workers are, and I quote, "We are against Polish people coming over here and undercutting British workers. I mean how would the Polish people feel if their government started letting in millions of Vietnamese and letting them work for three bowls of rice a day." by drawing a chart showing the minimum wage earned by Polish workers compared to the minimum wage earned by white native workers. Both of course are subject to minimum wage laws and paid the same, with British workers usually being less of a headache for employers because of language barrier...
Or maybe they'll show an image of Wierbowski, the Polish-named character from the film Aliens, and use it to demonstrate that Poles are useless in a firefight as Wierbowski died in the first hostile action in the film.
What an enlightened bunch the BNP are.