Cockney Weasel said:
If I had a time machine I would travel back, grab him by the lapels and bring him back to our time and show him how wrong he was, point out that his oh-so-saintly father's madness and death was most likely due to syphillis and then dump him back in his own shitty time period where his sort of racism was quietly tolerated.
You know that wouldn't work, you wouldn't be able to change his perception and if anything, it would just confirm his beliefs, he'd only see what he wanted to see.
He would write a story about a man who has a strange dream, in which he was visited by a deluded being from the future who takes him on a journey in an attempt to show him the errors of this thinking, but instead shows him the horrors of modern society, which despite all it's enlightenment & technological advancement, the being himself is blind to, but the protagonist can see only too real.
He'd write about how the sub-human tribes have run amok in society, how they trample each other to death in a derranged mob, fuelled by an evil desire for material poessions(sic), on a day which is so named after those tribes.
Of how these tribes corrupt the youth with their seductive music, with it's tribal, hypnotic beats, taught to them by Cthulhu, which permeates every facet of society & entertainment. Chief among these agents of Cthulhu would be the sub-human so named after the evil of money & material possession, '50 Cent'.
How those who have been persuaded by Cthulhu show their allegiance by the wearing of outlandish jewellery, called 'Bling', which he suspects was given to them by Dagon himself.
He'd write about how Cthulhu not only influences man through dreams, but also in a new incorporeal guise, named 'Internetothep' (a demonic Arachnid in its own dimension). How it corrupts man, makes him slothenly & spreads it's perversions in a World Wide Web.
He'd talk of the servant of 'Internetothep', the trickster deity 'Wikipedias', how it seduced those seeking knowledge but tricks them with false information & lies, which may appear to be the truth, but are in fact perpetrated by other agents of Cthulhu.
The story would end with the protagonist waking up for his dream of the future, drenched in a cold sweat, plagued with madness and gibbering about the "Horror of the future, how mankind must act now to change it's destiny, oh the horror, the horror..."