sparechange, I think it suits your world view to believe these people were an angry mob, rather than people who were directly affected by the fire, and local residents who are angry about it. I think you should recognise that there were many there holding home made placards out of cardboard - and pictures of their friends and family members who are missing.
The man who organised this protest, who is currently having his name smeared in the RW press for being a Corbyn supporter, actually lost a friend who lived on the 23rd floor.
From the BBC:
One member of the public said: "Nobody knows what is happening. People are so angry. Those people shouldn't be sleeping in the street."
Mustafa Al Mansur, who organised the protest, read a statement from the council which promised to re-house as many people locally as they could and to provide funding for those affected.
I don't suppose you thought to ask yourself why that poor man speaking on LBC, a victim of the fire, a man who has lost everything, had to physically present himself to the city hall for help?
Why the hell are there not people on the ground, at the volunteer's centres sorting this out for them?? People have literally donated tons of clothes, food, money - why is it not being co-ordinated?