One reason that elite intellectual liberal political correctness is immune to the secular right is that PC feels like a higher morality.
Therefore the most idealist and purely-motivated secular intellectuals will gravitate to political correctness.
Both the secular right and PC left agree that human happiness is the highest value, and both link this to an abstract process.
The secular right links happiness to evolutionary processes such as market economies, and in general competition and natural selection.
The PC left links happiness to altruistic (often egalitarian, but sometimes reversed-spontaneous) distributions of goods.
The secular right bases its reasoning on human nature and spontaneous tendencies, and tries to harness these for the general good by using abstract processes.
The general good is equated with the most efficient performance of social functions such as economic production (especially this), military defence, civil peace and so on.
The efficient ideal is to get the most and best quality of function for the least input of resources, and thereby to enable perpetual growth in all desirable functions.
In practice, the secular right regards the best outcome as that which emerges-from the operation of the best process.
The PC left bases its reasoning on ideal human nature (how humans might, possibly, perhaps be - or at least not-certainly-not-be) and on desirable outcomes not processes - in principle, any process is permissible if it leads to the desired outcome.
The best process is that which leads-to (not emerges-from) the best outcome.
The crux of the moral difference between secular right and PC left relates to original sin.
The PC left sees original sin as that innate human selfishness and individuality which resists altruistic distributions of goods.
The secular right denies the existence of original sin; it takes humans as they are, and tries to work with them.
The secular right individual either feels no guilt about his own motivations and behaviours (his selfishness, nepotism, lust, pride etc.) or else strives not to feel guilt - and argues-against his tendency to feel guilt.
The PC left individual feels guilt at their own failure to embrace altruistic distributions: for example that they spend money on themselves rather than giving it to anyone poorer, that they favour their own family over unknown strangers.
The PC idealist - recognizing the incorrigibility of his sinfulness, and needing to exculpate his guilt - therefore seeks to be coerced by the state, so that he - and everyone else - will not be able to act selfishly.
The secular right individual typically espouses some kind of utilitarianism - and affects to seek the greatest good of the greatest number; or perhaps (in a nationalist version) the greatest good of the greatest number in his country, or perhaps (in the ethnic version) the greatest good of the greatest number of his race or ethnicity.
Yet this is not really rational - except as a camouflage for what is actually individual self-interest. If forced to choose between his own certain and immediate and long term good on the one hand - and on the other hand what is inevitably a conjectural and uncertain good for many or most other people - then it makes sense to be selfish.
But either he does not care about being selfish (being a psychopath) or else tries not to think about this.
The secular left individual also affects to espouse a type of utilitarianism, but is mainly focused on the intrinsic sins of selfish individuals.
He can see no real hope for a society of competing selfish individuals - and so seeks to disempower individuals and curtail their freedom to be selfish. Hence the PC advocate favours coercive impersonal mechanisms for imposing altruism on inevitably selfish humans.
But whence derives the assumed virtue of these impersonal systems? Why would not coercive mechanisms force people to be evil, instead of good?
Either he denies this problem (being psychotic) or else tries not to think about this.
Confronted by a choice between embracing selfish psychopathy and altruistic psychoticism - the most idealistic secular intellectuals will surely continue to embrace the bleak martyrdom of PC.