@Keyplus.
Holocaust denial is not illegal in the UK. The UK, in fact, was one of the countries that voted against an EU wide law criminalising holocaust denial on the grounds of free speech.
http://en.wikipedia.o...inst_Holocaust_denial
The reason that countries have adopted such a law is that such sentiments are often mentioned hand in hand with hate crime.
"As a result a compromise has been reached within the EU and while the EU has not prohibited Holocaust denial outright, a maximum term of three years in jail is optionally available to all member nations for "denying or grossly trivialising crimes of genocide, crimes against humanity and war "
This has become an issue of extremists and calculating figures within the religious and political hierarchy attempting to impose their worldview on everyone else by murder, terrorism, violence, mob rule and intimidation. The number of times this happens is legion, going back to the fatwa issued against Salman Rushdie, through to the murder of the US ambassador over a amateur hate film designed deliberately to incite such over-reaction. None hear support this film, that I am aware of; All would recognise it for what it is. But regardless of how offensive your religion might find it, ideas and religions have to rise above such goading. A mature, responsible religion would preach tolerance, understanding and calm - and its true that some immams and muslim commentators fully understand this - read the article that naomi linked to for evidence of this.
But you have to recognise that whilst masses erupt, and burn flags, and place death threats, and storm embassies, and murder diplomats in the name of their religion, that religion and its adherents will be viewed, with suspicion, fear, and loathing - and will create a vicious and growing cycle of xenophobia, inflammatory comment and violent counter-reaction. Extremist groups all thrive in a climate of fear, and your religion seems unable to see this.