If you think his writing is any of what you posit,

It does. Most of us don't go around writing essays rationalizing how we treat others like shit, and framing basic decency in daily interactions as "expending of energy", and then make it believe everyone else should just be ok with this.

It's a colossal red flag. Then the racist rants make it all the worst.

Don't take my word for it. Perhaps take the hiring managers' word?