i might be wrong about this but since sesame has been cultivated for seven thousand years throughout the middle east and india i am guessing that seed oils generically are not a significant part of the cause, though i'm not aware of a traditional diet that gets the majority of its calories from sesame oil (like the hadza with honey or some inuit diets with meat)

but there are lots of other seed oils that have become much more popular in the last half-century that are more plausible suspects, like cottonseed oil, sunflower seed oil, and safflower oil

i think rapeseed oil is probably not it because its popularity is more recent