"Man has been reared by his errors" (Nietzsche JW 160)

Nietzsche maintains that Christianity is 'Platonism for the people' (BGE Preface);a vulgurarisation of Platonism. Plato himself desired Philosopher Kings,and to that end he wrote his Republic and his Laws. He also stayed for some time at the court of the Tyrant King Dionysius,hoping to have his philosophy turned into political actuality.
Epicurus regarded a philosophy which entertained such political involvement as devalued;
"How malicious philosophers can be! I know of nothing more stinging than the joke Epicurus took the liberty of making on Plato and the Platonists: he called them 'Dionysiokolakes'-'flatterers of Dionysius'-consequently,tyrant accessories,and lickspittles; beside this,however,it is as much to say,'They are all ACTORS,there is nothing genuine about them' (for 'Dionysiokolax' was a popular name for an actor).
"And the latter is really the malignant reproach that Epicurus cast upon Plato: he was annoyed by the grandiose manner,the 'mis en scene' style of which Plato and his scholars were masters--of which Epicurus was not a master!". (BGE 7)

To Nietzsche the prime fault in Platonism was its moral philosophy,what is referred to in the Preface of BGE as 'the most dangerous dogmatic error',that of the 'good in itself';"All the more profound natures of antiquity were disgusted with the philosophers of virtue: they were looked upon as quarrelsome and playactors;judgment on Plato of Epicurus". (BGE 434)