Yes, because as you say, they are utterly unhinged. Impervious to facts, sense, ethics, thinking exactly like the most zealous cultists... and (ironically for people who are always wanging on about this) busy "othering" . Many have got beyond the point that they can even see those who differ in their view as human beings. Even if they knew them personally before.
What I find terrifying—and I do also know some on that list personally, many are on the grassroots writing and poetry scene, even if they aren't 'big name' writers— is that they are perfectly happy to believe terrible things about women that many of them actually know and to claim such women hold beliefs that they simply do not, to allow lies to fester about them and to condemn them to a virtual witchburning on that basis.
Given that SO many of their beliefs are the opposite of factual, seeing that they believe nonsense so fervently that they actually think anyone opposing them is a "literal fascist" and are happy to spread and support that narrative, hound and target women who don't agree with them, and cheer on those who would commit violence on the basis of it, then yes, they are very dangerous. In the same way that throughout history terrible atrocities have been enabled once tribalism takes hold, among people who were once rubbing along perfectly well as neighbours.
And I think that guttural fear is perfectly natural. These are no longer rational people. Having to be VERY careful of what you say to whom because you might unleash real violence against yourself is not a normal state of being. This ideology and people's behaviour over it is one of the most toxic situations I can EVER remember.