This is the justification given in the Quran - pigs are called “filthy”. The pig remains a symbol of disgust even in cultures that consume it - see how Ukrainian memes portray Putin and Russian soldiers with pig caricatures.
Fact. Germans (I am one) are enthusiastic pork eaters, yet the pig makes an appearance in derogatory words e.g. "Schweinerei" for something messy/disgusting or "Sauhund" for a disliked person. Then again, it is also a symbol of luck, e.g. little marzipan pigs, or the expression "Schwein gehabt" for a lucky event.