The great band Massive Attack however did do something.
First, when they headlined at the Longitude Festival late July, they sent messages to their audience about Gaza.
For more, read this article in The Independent.
Second, also in late July (28), two members of Massive Attack, Robert Del Naja and Grant Marshall, toured the Al Naqab Center at Burj al-Barajneh refugee camp in Lebanon. The center offers remedial classes, a meeting place for active youth and other social activities, primarily for Palestinians recently arrived from Syria. On the 29th, they staged a concert to benefit the Al Naqab Center, organized by the Hoping Foundation. The money also went to fund building a new public library in a camp in the north of Lebanon and to supporting the ambulance service in Gaza. Read more here, also from The Independent.
Massive Attack at Burj al-Barajneh, wearing kufiya scarves.
Robert Del Naja is in front, Grant Marshall in back
Finally, here's a post I did back in 2010 on Massive Attack and Palestine.