Everything Hellenic that needs to be forgiven and transfigured...

Unfortunately I have not understood in its full profundity why it is that everything Hellenic must be forgiven for having existed. Can anyone with a better understanding of the Greeks (and or N) explain what is meant here? From BGE #28.

"And as for Aristophanes—that transfiguring, complementary spirit for whose sake one forgives everything Hellenic for having existed, provided one has understood in its full profundity all that needs to be forgiven and transfigured here— there is nothing that has caused me to meditate more on Plato's secrecy and sphinx nature than the happily preserved petit fait’ that under the pillow of his deathbed there was found no “Bible,” nor anything Egyptian, Pythagorean, or Platonic—but a volume of Aristophanes, How could even Plato have endured life—a Greek life he repudiated—without an Aristophanes?"

The simple idea is that Greek life, drama, tragedy, philosophy, etc. were heavy subjects. Much chaos, emotional turmoil, suffering, struggle, etc. It was a difficult existence to fully endure. In German, forgives/forgiven are expressed by "verzeiht" and "Verzeihung"; it should be understood as not holding this weightiness against the Greeks. We, as moderns, are able to do this by virtue of the comedy of Aristophanes. His joy and lightheartedness justify the tragic, dramatic, philosophical pursuits of the Greeks which, in themselves, were painful so much so that one might conclude they are worthy of repudiation.

In the context of #28 from Beyond Good and Evil, Nietzsche is criticizing the Germans and their language for not enabling free thought. He says the spirit of Aristophanes is foreign, still, to the German. In this context, one could understand Nietzsche as advocating for a "German Aristophanes" who will be able to inject "presto" or "allegrissimo" into the German language as Petronius was able to for the Romans. In very, very simple terms—the serious and long-winded needs the the fast and fun to justify itself in the long run, even after death as with Plato and his deathbed.