Just reposting this excellent point from lemmygrad
I agree with your points overall but i feel frustrated since the argument about avoiding revolution and counterrevolution was ignored.
The argument rests on the fact that it was not some malicious murder done out of evil in the heart of a vengeful prole (though I would not blame them for it) but instead a politically motived killing caused by the material reality and historical risk monarchial heirs have proven to be time and time again. This is not dehumanising.
I don't really get the point about being jumpy by the mention of walls. For one thing it is a common refrain both on this site, and "to be put in front of the wall" or similar phrases are normal in many languages. Assuming that a left unity site would be talking of killing other leftists, strike me as a strange initial assumption.
I don't really see why anarchists would be extra hurt by the talk of walls, if you are here referring to historical conflicts. It was not as though that fighting was a one-sided affair either. The makhnovosts made use of secret police, and were in a lot of ways quite repressive. Reaction and counterreaction is not tied to a specific ideology.
I think the idea of wanting to take protection of minorities and LGBTQ+ seriously, but then also being squeamish at the allusion or mention of violence, strikes me as incoherent as well. Protecting people against reactionaires will, at times, require violence. Likewise will the changing of the system require violence.
That is to me a sad fact, but it is only grotesque because we do not consider how much violence is used every day to maintain the system as it is.
I think Mark Twain puts it very nicely:
THERE were two “Reigns of Terror,” if we would but remember it and consider it; the one wrought murder in hot passion, the other in heartless cold blood; the one lasted mere months, the other had lasted a thousand years; the one inflicted death upon ten thousand persons, the other upon a hundred millions; but our shudders are all for the “horrors” of the minor Terror, the momentary Terror, so to speak; whereas, what is the horror of swift death by the axe, compared with lifelong death from hunger, cold, insult, cruelty, and heart-break? What is swift death by lightning compared with death by slow fire at the stake? A city cemetery could contain the coffins filled by that brief Terror which we have all been so diligently taught to shiver at and mourn over; but all France could hardly contain the coffins filled by that older and real Terror—that unspeakably bitter and awful Terror which none of us has been taught to see in its vastness or pity as it deserves.