Britain has always been an antisemitic country. This is nothing new.
Yeah, and their Left's disastrous Immigration policies have only made it worse. They've taken in so many Muslims who haven't assimilated. I suspect the Blow Back on that will be pretty rough at some point. The same can be said of various other Western European Nations as well.
I do not think it is the Muslims who are responsible for antisemitic fervor in UK and Europe in general. Europeans have always been very antisemitic. If you read Merchant of Venice, you will see what I am talking about.