Discussion is give-and-take. You listen, then you respond. You take the points raised into account. You can then reply, "Yes, that's a good point," or "Sorry, I can't agree, here is why."
Disruptors typically respond with an ideological script, or with insults -- or very often, with both. They are akin to "seminar callers." It's all a recital. When we reply with material that doesn't fit their script, they get confused and angry. Their replies become personal instead of addressing the facts and ideas under discussion.
Another quality of the disruptors is a dead giveaway that they are up to no good, namely, they have no humor. What a sorry view they have, not to be able to smile at anything. Good riddance to the humorless!
More on these matters as we go.
The agitators would use mantras over and over, for effect, not for meaning. After a while, nothing more was original, but designed solely for emotional impact, to rile us and get us off guard. And, yes, when they fail, they get emotional. They respond knee jerk and use the old Marxist technique when losing the logic skirmish, resort to personal attack. And then, since they cannot see their own evil, they attack headlong, blindly, and unmasked.
That is what happened in buckets full on the bugzapper thread. They just could not help themselves, had to explode. I noticed as did you that a little humor, which they have no way of comprehending sets them off.
We shall see in coming days if the wounded and those in hiding emerge.