LOL at people making fun of others because they themselves are stupid. This is because of allergy labeling. Milk is a top 5 allergen and must be declared on the label of any product that would trigger an allergic reaction, which includes butter. Of course real butter contains milk, but is this real butter or one of the many fakes? Of course this could be solved by a sticker instead of destroying the product, Government is pretty stupid too.
But I believe this actually speaks to a deeper issue of the entire problem altogether is that there is all of this fiat marketing that must take place that is allowed by the government bureaucracy that gives companies the ability to proclaim that they are one thing when in fact They are not that so by proxy them being able to say that they are butter when they are actually not butter and are margarine instead makes this problem in the first place