The comparison with Christianity is instructive, though, isn't it?
For instance, I have changed my mind about Sharia courts being allowed in the UK. Until recently, I didn't see the harm in it, given that it would be absolutely no different from the Jewish courts that already exist.
But then I had a think about why those Jewish courts exist, and it is for the same reason that Christian courts exist in Egypt. There was a time when British law was indeed Christian in its very nature, and so allowing Jewish courts for family law was a sign of a tolerant Christian state, just as allowing Christian courts is a sign of a tolerant Islamic state.
Now, in all but its purely symbolic forms, the UK is a secular state, so the reason for Jewish courts to exist is no longer valid. Rather than allowing Sharia courts, I would argue instead for completing the job of fully secularising the state and getting rid of the Jewish court, ridding the UK of the final vestiges of past Christian notions of supremacy.
That other religions have notions of supremacy isn't a reason not to say that Islam has too.
