Why are there riots full of hatred and emotions taking place in Britain?

WORLD NEWS - It would have been difficult to imagine that in a developed society like Britain, there would be riots filled with hatred. It may have been even more difficult to imagine that the riots would continue for weeks after they began. But this is the reality of Britain today. Now Britain is having to pay a very expensive price for the kind of politics that has happened in the country in the last decade.
Immigrants have been the target there since the Brexit movement. Various kinds of things were spread about immigrants and an atmosphere of hatred was created. Such propaganda continued on social media. On the other hand, mainstream political parties were busy taking advantage of the environment created by it. Now this atmosphere has become out of control. Last week three girls were stabbed to death in Southport. Far-right groups launched a fact-based campaign on social media about the killer. In this the killer was described as a Muslim and an immigrant. Although these things have been refuted, organized propaganda still continues on social media. People enraged by this have attacked at various places.