Is Britain a flow of Racism?

A mother with a little boy was shouting against foreigners by herself, with swearwords. As you can see the video, the train was chaos because of this woman, other passengers around her were trying to get her down though she never stopped.
From this video, I think British people are struggling with foreigners even in London since a massive unemployment rate shows most people lose their job that are taken by cheap labour from other countries. I would not say racism and discrimination are a huge problem in London, however, looking at other cities; Birmingham, Manchester, Leeds and so on, these cities are indeed struggling with this problem. I did not know British people are likely to look down people from overseas until my friends talked about this to me. They all have experienced a little or big discrimination in UK unfortunately because of their different nationality.
Although discrimination can be seen anywhere in the world, why not understand or even respect others even if people very much pay attention to it as the numbers of views on this video?
British people are known as ladies and gentleman, but there is no glimmer of conscience in her mind.
This is because of nationalism come from economic matters hit in the UK nowadays, which abuses people's racist mind?