I think people forget that the muslim faith has many different varieties of as with the Christian faith, some are extremist some are pacifists some will hate other religions some we'll live with other religion some will embrace other religions. All will have different interpretations of their own big book because at the end of the day it is how do you read it and what some man wearing a robe teaches you, as for the newsagent that was heartlessly killed his belief and following in braces other religions to the point that other Muslim sects do not like them, this has also happened within the Christian community where catholics has waged war against Other Christians who pray a different way and other christians waged war on catholics, we have just celebrated Easter but orthodox Christians do not celebrate Easter at the same time as us they have a pacific date where they celebrate it not a government defined weekend.
Once upon a time there was UK law then devolution started to happen and the Scots got their own Parliament but now makes their own rules the Welsh got given The power to make their own rules as long as Westminster liked them , Northern Ireland were given the power to elect IRA killers and silly people.
Let's not Forget that the catholic church puts hundreds thousands of people to death every year by not allowing someone to put a condom on their thing
I do not disagree with you, that all Muslim sects believe or would act in such a way. But as I said in an earlier post, the Koran are the words of God dictated to The Prophet by Arch Angel Gabriel. They are the words of God, not the words of man inspired by God, as in the Bible. Islam believe that Christians got it wrong & Jesus was just another Prophet. If you read some of the passages in the Koran, you'll see that God tells Muslims to carry out certain acts against the infidels, or gives them dispensation for such acts. Hence some sects the Islamic faith see nothing wrong, in killing infidels for example.
Luckily, we have laws against such acts, but sections of society believe they are only following Gods words. I firmly believe the expression 'when in Rome, do as the Romans do'. Therefore I have no sympathy for Brits who consume alcohol, kiss in public etc etc, in Arab states and fall foul of their laws. Saudi Arabia dos not allow Christians to worship openly.
In this country we are more liberal with our views, and allow other religions to build places of worship. Perhaps this liberalism get us into trouble and we should be more like the Romans. We were guilty of acts of barbarism and disingenuous to others, as late as Edwardian times. But I think we've moved on since then. Time for others to move on. If the Islamic faith wants to be seen as moderate peace loving, it has to do more than its doing now.
There has never been laws that were the same across the countries (that now make up the UK) , as they had their own laws, prior to the political Treaty of Union in 1706.