Personally, I've never heard the term "darwinism" coming out of the science community. It's always been obvious to me that Darwin is celebrated so much because he made a major breakthrough, which then enabled all the further progress in genetics, medicine, etc. we enjoy today - not because he's considered some infallible father of an ideology. I think that those who consider "darwinism" an ideology are just projecting the weaknesses of their own belief system onto science because they don't understand what science really is and how it works.