My take on it is a bit different, but we are free to disagree. First, I have no idea whether Amir or Danny are right in their arguments. Personally, I wouldn't buy speakers that I felt needed what Danny does and if I was that dissatisfied I would get new speakers. That's just me and if Danny's customers are happy with his work, as many seem to be, that's great.
Obviously, Danny and Amir have had a pointed exchange, but I didn't see any savage attack. Amir, from what I saw, didn't label Danny as stupid or a nitwit or a criminal. He did attack the benefits of the work Danny is selling for those speakers in a substantive way. Danny responded. They both made substantive points and everyone can decide who makes sense to them. To me, attacking someone personally is different and usually just demonstrates that the attacker doesn't have much of value to say on the topic at hand or is stinging from losing the debate on the merits.
Again, I have a fundamentally different view of audio than Amir, but from what I've seen, he generally presents his (flawed to my mind) views without getting in the gutter. Which I appreciate. I don't have to despise Amir to disagree with him. I'm not big on banning people from forums or deleting comments, but if you own the forum you have every right to run it as you please and the remedy for those who disagree is to avoid that forum.
I don't watch every Amir video or spend much time on ASR where there certainly are lots of toxic comments, so I might have missed something.