What are you trying to say?
At first glance, it appears you are hinting that it is only the presence of Jewish people in Great Britain which is keeping Muslims from taking over from the native Anglo-Saxons.
Are the Jewish people present in large enough numbers to do that, or are you alleging God is only holding back the Muslims as long as the Brits have Jews living among them...?
I actually had in mind a video I saw yesterday with one of the "protesters" in London, interviewed by a friendly (Al-Quds) reporters, who was saying how they will "take care" of the Jews in the UK and Europe and then replace the UK government with Sharia and imposed Islamic laws on individual Christians. "They will pay the tax, submit to Islam or be imprisoned." i'll try to find it