Outsiders are certainly inflaming the situation as it is at present
The people placing the flowers are 'the outsiders inflaming the situation'. The locals want the flowers removed, they have said so to the media (witholding their names) and are obviously too scared to go out and remove them, so others are removing them on their behalf.
I am not sure it's understood how serious and frightening threats, either direct or veiled, from hardened convicted criminals or gangsters, are. The pensioners, and possibly their neigjbours, are now having security devices fitted to their house, some of it by the fire brigade. Their downstairs windows are completely boarded up. They are being called 'murderers' and alsorts by the burglars family but they have done nothing wrong.
They are being menaced by a large extended family of hardcore serious offenders. This is not just about some kids breaking into a house. They were armed buglars, they have spent years serving long prison terms and now their relatives are attempting to take over the street by repeatedly placing tributes. It wouldn't have been so bad if they had backed off the first time the 'tributes' were removed, had second thoughts maybe but no, they keep coming back for more. Who is 'inflaming the situation' again?
What 'Pinochet, Thatcher, Princess Diana or the EDL' have to with any of this, God only knows