What we know about his personality is that he is dishonest and filled with hate.
Anyone capable of murdering innocent people is more than capable of lying to cover his azz...
Perhaps he “perceived” whitey as being racist due to his guilty conscience.
He was a hate filled thief and made up enemies where none existed.
Personally I don’t CARE if the guy was in a “hostile” work environment seeing as how HE probably made it that way.