[T]he DNC finally apologized for “inexcusable remarks made over email,” saying it “does not—and will not—tolerate disrespectful language exhibited toward our candidates.”

Sure.  But—carefully—there’s not a syllable of apology for the Party’s actual bias toward a disfavored candidate, nor is there a minim of an apologetic word about the Party’s overt behavior toward a disfavored candidate in acting on that bias.  There’s only this expression of regret for some words.