Having read both parts of this essay, though I do not agree with every word of it my only real criticism is the title. No ideology can be "wrong" any more than any religion can be.
As the author pointed out at the start of Part 1, ideologies are based on beliefs (the same as theologies). No belief can be proven to be right or wrong. To accept a belief is to confer it with validity--truth--for oneself.
Conflicting beliefs inevitably generate "contests of power" (from Michel Foucault). The nature of beliefs makes such contests particularly irreconcilable.
Real progress would be to move away from beliefs of all kinds--ideological and theological--for governing the governance of society. I am convinced that I have found a way to do that: "Beyond Liberalism" (here in Medium).
Beliefs would still be a source of political conflict, but at least people would be forced to acknowledge the purely personal truths that beliefs represent. Hopefully, that might interject some degree of humility among all people regarding their beliefs.