It is not 'difference' or 'the Other' that people necessarily fear (or are against), but examples of negative and destructive difference. Not all sub-cultures and minorities in British society believe and act on destructive and violent beliefs such as those which can be clearly and easily found in Islam itself, not just in 'extreme' or 'fundamentalist' Islam. Why should anyone fear or stigmatise, for example, eco-hippies or naturists?
But Islam can be, and often proves to be (day in and day out both at home and throughout the world), different.
A primary belief of Islam, to be found in the Koran, the hadith and elsewhere, for example, is that the world is divided into the 'Abode of Islam' and the 'Abode of War'. Needless to say, every place that is not Islamic in nature is a part of the 'Abode of War'.
The non-voting habits of many British potential voters does not in itself point to a lack of faith in democracy. Instead it could refer to many people's lack of faith in the manifestations of present-day, party-political Parliamentary democracy, not in the concept of democracy itself in any of its other forms. Islam, on the other hand, both in the Koran and in terms of historical and currently-existing Islamic states, does not traditionally believe in democracy because, by definition, it (democracy) is a thoroughly man-centred form of government and not one that is ordained by Allah Himself. Secular democracy is not therefore constituted in terms of theocratic authoritarianism and purely Islamic notions of governance, justice and law.
Again, instead of speaking, so predictably, about the 'myths' the British public, on the whole, uphold about the nature of Islam, others instead speak of the 'demonising of Islam'. But as with the many and frequent accusations, against the broad British public, that it believes in the 'myths', not the truths, about Islam, this almost always simply means that
'myths about of Islam' = negative views of Islam
'demonisations of Islam' = negative views about Islam
Of course it is not logically the case that in every situation negative or non-positive views about Islam are, by definition, 'myths' or 'demonisations' . This is yet another example of a cliched and naive position on Islam's supposedly evident, to all who would but look, inherent beneficence and positivity.