if you have a liver full of parasites. they are in the liver and if you try to push them out...when they are alive and blocking ducts etc? you dont think that would make you sick?
better safe than sorry. eating veggies in lots of oil is just like a Liver Flush in the sense that it pushes a lot of fats through your liver. not as extreme as the Liver Flush but it does return function. it has no chance of all making you sick.
doing a Liver Flush before a parasite cleanse does have the chance of making you sick.