So manufacturers kept on making it. We are trying to find out just what it really is, and will let you know as soon as we find an explanation that doesn't require a chemistry degree to understand it. It is definitely NOT a whole food at any rate. Canola oil is from a plant that has been hybrid, just like most of our vegetables. Hybrid is the old fashioned method of breeding different varieties of a species to get desired hereditary traits to be manifested in the next generation of the species every time.
Corn is a very famous hybrid.
It was originally called maize, and through the process of hybridization, it is not 3 inches long with only a few kernels on it. Now it is 8 to 12 inches with hundreds of kernels, and comes in a lot of varieties for different uses. So canola and rapeseed are different species, even though rapeseed is the originating species, just like maize and corn are different now. The rapeseed that was used in western countries was industrial grade. Confusion over the differences is where the controversy comes from, and is compounded by a report from the early 70's when someone in Spain sold industrial grade rapeseed oil that was stored in contaminated containers to folks in rural areas and several people died.