He’s wrong on this one.
The UK needs to get out of the Commonwealth then, too. Commonwealth nationals can immigrate to the UK anytime. And Pakistan, Bangladesh, Malaysia, Nigeria, Kenya, and even India (second highest population of Muslims in the world) are all Commonwealth countries.
That’s no longer the case, and hasn’t been for many years. There’s only a right for Commonwealth citizens to immigrate if a parent or grandparent (with various other qualifications) was born in the UK, and there are also restrictions based on birth date, etc.
correct — nearly all of Britain’s moslems come from outside the EU. Brexit won’t stop the moslem in the UK