It is both cultural and genetic. The pajeet is basically an IRL orc. Like Tolkein, we end up debating if these monstrosities can be redeemed. Their culture created their bad genes. They are bred from thousands of years of no sexual selection (ugly), easy living conditions (weak), while being organized by superior people from outside their lands (stupid). Arguing whether or not a pajeet can rise above their station is about as useful as debating if modern pugs or toadline pitbulls can be fixed. Maybe, but only through the injection of non-pajeet genes or eugenics, and what's even the point of keeping any pajeet genes around. Half-jeets are still ugly and awful. Only purpose for them would be for an evil wizard (i.e. globalists) to direct them at destroying non-pajeet countries.
So, to be concise, deport all pajeets, half-pajeets, and pajeet sympathizers to India or the nearest hell dimension.