OK you asked for comments re the Death Squad video essay in the video. From memory and I couldn't locate this there was an instance back in the 30s ? of a lecture on Dada in the USA where the lecturer whose name I forget threatened the audience with a loaded gun. But famously or infamously 911 generated this from Karlheinz Stockhausen (
http://www.artandpopularculture.com/Karlheinz_Stockhausen_on_9/11)
re 911 Quote Stockhausen "What happened there, is – now you must all reset your brain – the greatest artwork ever. That spirits accomplish in one act something that in music we could not dream of; that people rehearse like crazy for ten years, totally fanatically for one concert and then die. That is the greatest artwork for the whole cosmos. Imagine what has happened there. People who are so completely focussed on one performance, and then 5000 people are chased into resurrection, in one moment. I would not be able to that. In comparison, we as composers are nothing. Imagine that I could now create an artwork and all of you would not only be amazed, but you would drop down on the spot, you would be dead and reborn, because it is simply too insane. That is what many artists also try to do, to go beyond the limit of what is thinkable and possible, so that we wake up, so that we open ourselves for another world."
He subsequently 'back pedalled' from this extreme statement..
Interestingly, I hadn't noted – the DIAS movement, The Destruction in Art Symposium (DIAS) was a gathering of a diverse group of international artists, poets, and scientists to London, from 9–11 September 1966. Coincidence?
And Key member Metzger,-"Guitarist Pete Townshend from The Who studied with Metzger, and during the 1960s, Metzger's work was projected on screens at The Who concerts.|"
And of course this
https://en.wikipedia.org/wiki/Helter_Skelter_(scenario) I also recall "Dreamspace V, designed by Maurice Agis " which accidentally killed two people and injured 13 others.
As to my opinion on Death Squad and the above being Art, I don't think so. Like William Bennett has said in interview – to go out to shock was his intention. Well terrorists do precisely this, often at the cost of their own lives, so should be considered also as artists. IMO the fundamental mistake is (maybe was) that some Avant Garde art was originally found to be shocking, famously The Right of Spring. Bennett – and others reverse this process, to 'if it shocks its avant garde'. Which IMO is (was) not the case. There is an Art of War but war isn't art, here I agree with Adorno that in fact certain acts can deny the possibility of Art. Though it is true that post-modern art has been termed to be now about (mere) sensation this might now be the case that acts of terror are now art.