I think the objection being implicitly raised by GP here was rather of the problem of 'at what human flaw should we stop toppling statues and celebrations as we

I think the objection being implicitly raised by GP here was rather of the problem of 'at what human flaw should we stop toppling statues and celebrations as we update our morals over time? '. It appears to be a valid question, in that slippery slope is not always a fallacy.