Muslim political commentator Mohammed Ansar has said that the "government is being complacent on issues such as crimes against Muslim communities".
"This is almost puts us into a situation where this country is sleepwalking into a summer of discontent," he told ITV Daybreak.
More top news
Nigel Farage warned on Friday Britain was "far less safe" and exposed to Cologne-style sex attacks because of open-door immigration.
Arthur Simpson-Kent, 48, admitted killing Ms Blake and their sons according to his lawyer.
Two brothers have been arrested on suspicion of murder after their parents were found dead in their own home over the weekend.