Popper coined the phrase "paradox of tolerance" when discussing how unlimited tolerance is self-contradictory (paradoxical) in that it precludes self-preservation (resisting intolerance). The seeming paradox can be resolved by accepting non-arbitrary, justified limits (exceptions) to tolerance; namely, conditioning tolerance on reciprocity (while still favoring rational discussion and leaving intolerance as the last resort in the case of Popper).
The structure of the paradox matches the absolutism fallacy (destroying the exception, sweeping generalization), and I've noticed this fallacy being widely applied to moral principles, so I was wondering if there is existing discourse on specifically what could be called the 'moral absolutism fallacy', preferably from an argumentation theory angle.
The moral absolutism fallacy is based on a false dilemma where a principle is presumed to be all or nothing (absolutized), i.e., a limited/conditional/situational conception of the principle is excluded from the full complement of alternatives because the limits are presumed to be unjustifiable. This false dilemma is persuasive because it relies on the absolutist intuition of justice needing to be blind and human rights being universal/inalienable, which makes limited conceptions of a principle seem hypocritical.
The moral intuitions working against absolutism or inflexibility would be about turning the other cheek, eye for an eye making the whole world blind, "your rights end where my nose begins", etc.
The false dilemma between either absolute or opposite conceptions of a principle ultimately is used to argue (often unwittingly) for moral relativism and unprincipledness, because the absolute/unlimited conception is paradoxical (as per Popper) and thus unacceptable.
For example, absolute pacifism is an abnegation of its grounding principles like the value of human life, because it doesn't accept violence as an option even though peaceful approaches clearly can't work in every situation. The solution is understanding pacifism as a higher-order/more nuanced/deeper principle that is grounded in more specific principles like favoring peaceful conflict solving as more effective, non-zero-sum.
Other common examples of rejecting justified exceptions are the "so much for the tolerant left" trope, free speech absolutism, freethinking absolutism ("mind so open that brains fall out"), absolute skepticism (epistemic relativism), etc.
Pointers for further reading that I already have are Plato's paradox of freedom (dictatorship naturally arising out of direct democracy), Rawls on human rights as moral absolutism and Locke on liberty, but I was wondering what would be something more recent and focused.