Absolutism tries to eliminate any criticism or questioning of an ideology.
Someone may agree with the goals of stopping police violence but question the rhetoric of a political group Black Lives Matter. Instead of inviting this dialog, they are labeled "racist" and the discussion is stifled.
Someone may support transgendered people and believe they have a right to security and respect, but question a policies impact on traditionally female spaces or disagree with changes to English grammar.... being 90% on board with a progressive agenda is no longer OK. Again there is no dialog, only labels.
Someone may believe in vaccines but worry about the impact of vaccine mandates. With absolutists, there is no possibility of this dialog or even an acknowledgment that these are different concerns.
In my opinion, absolutism,, the "one-sided" argument is the real problem in modern discourse.