You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
The_Blitz

Context:
The brief success of the Communists also fed into the hands of the British Union of Fascists (BUF). Anti-Semitic attitudes became widespread, particularly in London. Rumours that Jewish support was underpinning the Communist surge were frequent. Rumours that Jews were inflating prices, were responsible for the Black Market, were the first to panic under attack (even the cause of the panic), and secured the best shelters via underhanded methods, were also widespread. Moreover, there was also racial antagonism between the small Black, Indian and Jewish communities. However, the feared race riots did not transpire despite the mixing of different peoples into confined areas.

Question:
What was feared would happen when different races were mixed in shelters?

race riots