Like all Social problems, first we must understand that Muslims are more assertive in Modern States and they are just more apparent. If they had not been there, some other Group may have been in their place. Thus there is a vacuum in modern society that is being filled by 20th Century Islam or by 20th Century Hindutva. It has nothing to do with Original Version.
This problem was not envisaged when immigration allowed.Immigration was allowed because you needed people to do the jobs you disliked to do.
These people came to you bidding farewell to their own religion and culture in the hope of being assimilated.
The Racism shattered their hope and they regressed and taking advantage of your Liberalism and your concern for image of Tolerance they are asserting their own version of religion and culture, different from original one.
Even in Muslim States, different version of Islam is not permitted.
There is a Nazi solution to such social problems, rightly abhorred by nice people.
Then there is solution to confine all cultural and religious practices within four walls, whether of Britons or of Immigrants.
The migrated people had all respect for Britons but vacuum in British society in matters of Religiosity, Morality and Family made them stand against it. If these things be restored then it is hoped that they will lose ground to stand against Modern society.
A rational Universal Religion and Culture must be developed based upon Humanity,Universal Sibhood and Love.