I laugh at you.
you have been sussed by Fava and you haven't even notice.
He pained a pic of Poles according to the British news, so he was trying to show you, that you need to use your analytical skills, instead of relying on press info alone.
as for Poland multiculti - it is happening to a small degree but it will not be happening on a scale comparable to other Western countries for many reasons. Poland is an insular country, does not really offer much to foreigners, except for the few, who teach English, work for foreign companies or are married to Poles.
After all, a large number of them has left for the Isles and still leaving for other countries, so I cannot see a foreigner being attracted to it, if a significant number of citizens have been departing.
As for Poland accommodating a large number if cheap labour, I cannot see it either for the reasons I have mentioned above.