uh. no — the “immigration” that they are protesting about is immigration from the European Union. The Moslems there are already second generation. that’s a different issue, but the immigration one is about European immigrants — you can read up on that if you want
They are protesting both. They can't stop EU immigration due to various agreements on the free flow of labor within the EU. The Tories have promised to lower immigration from non-EU countries, but that appears to be just a promise. In May, the Tories will pay a heavy price.
In the same period there was a 10% increase in work-related visas granted to people from outside the European economic area - the majority of which were skilled workers.
So policies to curtail immigration from outside of Europe have not only failed to deliver the cuts that ministers hoped they would, the direction of travel has now reversed.