Thee is an inyan brought in seforim that some Yidden are on the level to be concerned with. It is called Maachal Akum, a food that is currently clearly idnetified with a specific non Jewish nationality. The Orchas Tzadikim in the first Perek speaks of separating ourselves from non Jews in our foods as well. It means from food CURRENTLY primarily identified with non Jews. So there are Chashuve Yidden who mean it for real and who would not eat Pizza or spaghetti because it is associated with Italians, or Chinese food ( China….. duh) or Sushi ( Japanese) but would eat lukshin, herring etc…. because they are not currently associated with non Jews. But if the origin of something was non Jewish but it has lost that identity, it would not fall into that category.
It may part of a madreiga of Kedoshim Tihyu- Perushim Tihyu. we need to respect those that are ready to do that even if we are not.