Okay, I think I understand what you're saying. By the way, I'm not trying to grill you here, just trying to understand both sides.
You know, when you notice that an idea must be strictly separated from a person, and only because otherwise discussions would focus too much on the (fallible) person instead of the idea itself, that's actually a sign of an immature discussion culture. Responding with anonymity makes sense, obviously. But what the traditional camp expects here is the old Islamic scholarly tradition (which nobody really follows anymore today, not even many scholars, and certainly not the Twitter mob) - namely tolerance and objectivity between idea and person. Like how the Madhhab Imams could honestly say, "I don't share his view on this or that topic, but I respect him greatly and even send my students to him." But without anonymity, because anonymity has its limitations and own disadvantages.
To put it bluntly, your faction says: People around us are screwed up, so hide behind anonymity so the idea can circulate. And our old tradition (and those who claim to represent it) says, disagreement is okay and good, but absolutely no reason to discredit someone or argue with them.
And honestly, I tend to lean toward the latter. The thinkers and authors mentioned in the MM article aren't anonymous either. And if they aren't, but an anonymous "biomass" sets out to discuss these ideas, it creates a two-class society within this movement, which is actually just a collective shaping of an idea. And guess whose idea carries more weight then. Because in the end, the real person behind an idea always carries strong weight, whether they're personally criticized or agreed with.