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You wrote
"No one yet has come up with an equivalent insult to cunt that is routinely applied to white males and has the same level of insult."
Yes we do; the word is "douchebag." Though it is applied to all males, not just white males, just like CUNT applies to all women, not just white women.
But I need to clarify the meanings of both terms as they pertain to speech. Cunt is applied to a woman that will stab you in the back, or will use her sexual appeal to cause you trouble. For example; Condi Rice is a cunt because she help lie to get authorization to invade Iraq, which has killed thousands of our best and brightest service men and women
Douchebag is a dim witted male that expressed his ignorance, illogical prejudices (not that prejudice is ever logical), homophobia, or misogyny in his behavior, character, or by what he spouts. For example; Rush is a Douchebag (enough said).
Both words have their importance, thought you can't say Hillary Clinton is a cunt without offering proof (has she stabbed anyone in the back or used her sexual appeal to cause someone trouble?), but you can say all the guys who wear the C.U.N.T or "I love cunt-tree music" t-shirts are definitely douchebags.