The flags are a sign that racism has a broad support now. So this is how it goes and it won't be long before Farage and his followers are suggesting that, although they do not of course endorse racism, it's time we had a 'conversation' about whether certain 'cultures' are compatible with 'British values' and 'British society'. 
There will be calls for the media  to better reflect the 'cultural makeup' of Britain with claims that certain 'cultures' are overrepresented and over promoted. There will be calls for the government to remove protections of certain 'cultures', in policing (hate crimes, incitement of racial hatred, probibition on racial profiling) and discrimination in employment legislation. 
 Just because those impacted by their policies and statements happen to be exclusively black and brown skinned people, it's not racism: it's just about the primacy and reflection  of British culture and values. 
The Reform MP basically said she doesn't want to see as many black or brown people on TV and Farage has said she's not racist. Pull the other one Nige, it's got bells on.