R.I.P. my sauerkraut fan club Let me be the first to bring Jung into this, "What you resist, persists", in trying to avoid the usage of slurs, you had to go and commit them to a public branch of source code to be saved in the arctic vault for eternity.
I feel like "Kartoffel" is often used in a more offensive way. Although I've never really seen someone getting really offended.