He means no brown and/or muslim migrants. The EU border would infamously let in even exchange students when the war heated up in 2022, except for those they did not want for clearly racist reasons.
Strange, that if you are from Norway or Switzerland, you cannot be a migrant anywhere, instead you are always a welcome citizen born afar who did not know it yet.
Racisms and other -isms seem to be a problem, let's hope it gets better, not worse, in Poland and on earth.
Norway and Switzerland are both Schengen area countries though and have been for decades, which is why there would be much less friction in getting in as a migrant, or no friction at all as a traveler.