@Martymcfly24
So in answer to @mids2019 OP there are several reasons for "knobs at Glastonbury "
On the left ever since Marxism and the proletariat and bourgeoisie there is a view of a victim and oppressor. That even if the "proletariat " is lifted out of poverty and is financially much better off by getting employed by say the "bourgeoisie" in a new factory then regardless they are still a "victim " because the "bourgeoisie" are financially gaining more so that the "proletariat " are still being "oppressed ".
In the case of conflicts the left will always view the stronger side as the oppressor regardless of the origins of the conflict. So to take a few examples Japan starts a war with the US bombing Pearl Harbour killing 2,400 people, the US retaliates defeating Japan, killing 3 million Japanese (including 500k to 1 million civilians). But because the US was stronger the left would view the US as the oppressors and the Japanese as the victims regardless of the origin of the conflict (including that the origins of this conflict go much further back than 7 December 1941).
Similarly the 7th October attacks by Hamas caused 1,139 deaths but because Israel have killed 56,000 Gazans to date (Hamas figures) then Israel are the oppressors and the Gazans are the victims.
Lastly to take a hypothetical playground example if a bully "Bob" hit a boy "Jeff" because of a long lasting animosity but it turned out that Jeff was an amateur boxer who in retaliation knocked the shit out of Bob, then under a leftist view Bob is the victim.
Bob Vylan was desperately trying to be "popular " with the crowd with his chants of "death to the IDF". Quite frankly if he thought he would get more "popularity points " with chants of "death to gingers" he would have done that instead. Which is pathetic, hate filled and not dissimilar to the anti semetic rants of the Nazis trying to get "popularity points" with 1930s Germans. So yes there are "knobs" at Glastonbury.