He's not smart enough to be "evil incarnate". I see insecurity, rabid weakness, fury, frustration and hatred at an inchoate "them"....the "them" who never let him into their ranks despite his most ambitious scramblings.
like you, I usually tend to think of people I'd describe as "evil incarnate" as being intelligent (as in Satanic...remember that Satan is kinda the hero in "Paradise Lost"). but I've been coming to embrace a much more inclusive definition.
after all, what somebody DOES is always more important than what somebody SAYS.