I’ve not been duped — read my answer, I don’t see him doing it out of the “goodness of his heart” - as he doesn’t have any.
He HAS and WILL support a pro-EU agenda, but read - https://www.tygodnikpowszechny.pl/tusk-tez-straszy-imigrantami-184620
—> he himself used the fact that PiS let in Muslim immigrants as a “no no”
Even most leftists in Poland do not want Mohammedans. Maybe the Lewica supporters, but no one else.