I have been digging into this some, and may have some insight to offer.
There are two kinds of hierarchies, dominance and competence. In merit based competition, those who are best rise to the top, and the resulting structure is good at what they do. The distribution of wealth of a competence hierarchy follows the Pareto distribution, in which very few people have the most resources.
In a dominance hierarchy, those got to where they were by exploitation, pull, privilege, and those who are the most dominant rise to the top and control power, denying access to those who would compete on merit. One has discrimination of numerous forms, and also direct elimination of competition, even if that competitor could do the job better.
Most of the world operates upon a competence hierarchy, but dominance hierarchies are common enough that some think they are the prevalent hierarchy. To break up a dominance hierarchy, one must forcibly pressure for inclusion and push merit based standards. Things like equal opportunity are there to break into the structure. Those who are at the top of such structures have a voice, and those who echo it are their mouthpieces. And thus for justice to prevail against this structure which has no merit, no inclusion, and could stand for a lot of improvement, some think the end of upending that dominance hierarchy justifies silencing those voices that align with it, and amplifying those voices who operate against it.
The problem though is if a competence hierarchy is viewed as a dominance hierarchy. We can see this post revolution Russia, in which competent farmers had their land seized and redistributed to party members without regard to their ability to actually farm, and there was massive famine. We also saw this recently in Venezuela with the nationalization of the oil industry, the installation of party members and favorites as administrators, the looting of the enterprise to the point it collapsed in ruin.
Most of us like to think that we have something to offer to the conversation which is more than mere parroting of the ideas of others. Most of us see value in interaction with others because through civil dialogue we expand and refine our understanding, find out where our blind spots are, and both parties improve. Thus there is an obligation to permit others to speak freely, and also upon us to give fair consideration to what they say.
But when you run into someone who views the world as a vast dominance hierarchy, and you as a mouthpiece for such, they will not listen to what you say, since they are fighting that evil. They shut you down, they do not let you speak, they do not give you due consideration.
And when I look at all of this, I do not think the ends of destroying dominance hierarchies justifies the means of silencing free speech, not engaging in civil discourse, and not giving others fair consideration. When one adopts the latter, we erode society in a terrible way that operates against all, and worse paves the way for tyranny in the form of censorship from on high. In fact when one employs such tactics to undermine a dominance hierarchy, one establishes and even worse dominance hierarchy to replace it.
For us to make any progress on these issues, I suppose those who are presently engaged in the tactics must personally experience the downside of such tactics when it is directed at their own person. Only then can empathy drive a willingness to divorce oneself from such tactics. And I think the other way to undermine this behavior is to illustrate and educate that what they think is a dominance hierarchy is largely a competence hierarchy, and point out that such tactics are destructive when employed against merit based hierarchies.