The Blue Star Empire is promoting gourmet cuisine, not just within the Blue Star Empire itself, but gradually expanding outward. However, their very friendly and peaceful plan to share gourmet food with all interstellar empires is not being well-received by most empires.
Those empires that are on good terms with the Blue Star Empire are fine with it. With the precedent set by the Iron-eating Beast Empire, they have started to willingly accept gourmet food, and it has indeed won them over.
But those empires that are hostile towards the Blue Star Empire, or remain neutral and don't dare to establish diplomatic relations with it, treat gourmet food like a snake or a scorpion.
It's not that the food isn't tasty, nor that they dislike it. Accepting the food openly would mean establishing friendly relations with the Blue Star Empire, which would break the previous "peaceful" situation.
