So this picture presumably is in response to a Muslim attack on non muslims. Presumably after todays attack, there will be similar displays from non muslims to muslims. This is all good and encouraging.
But there were rumblings straight after this attack that the police didn't respond as quickly as they did for London Bridge, complaints that the media aren't covering it with the same fury. Muslims feel like they aren't being treated the same as non muslims in this country.
Whether they are or not is a completely different matter. What matters is the ammunition that the extreme elements can use to build up their rhetoric to sow further division.