The Egyptian-born Muslim cleric Yusuf al-Qaradawi was once invited to speak in this country — and the row which developed as a consequence was both entertaining and instructive. Many people said he shouldn’t be given a visa because of his ‘extremism’. Others, such as the mainstream UK Muslim organisations, insisted that this was a libellous description and that Qaradawi was a moderate who had always favoured dialogue with people of other faiths; Ken Livingstone went further and described him as being a ‘leading progressive voice’ within Islam.