Bouvet says PC blinkers have prevented the Socialists from addressing working-class anxieties about immigration and the rise of Islam – even in its moderate form – in areas where the so-called Français de souche (born-and-bred French) find themselves outnumbered by those with a different religion and cultural habits.
Can you please explain to me what the meaning of "PC blinkers" in the above sentence is? Does it mean that French socialists are politically ignorant and not perceptive?