Emerald will just argue that Muslims don't mean what they say, they just say it because [insert illogical excuse here]. Any attempt to point out that they are responsible for an insanely disproportional amount of violence will be disregarded as racist or worst, despite it being based on reality.
Britain has a serious problem with Muslim extremism. It is only going to get worse. Immigration reform needs to happen, so that the UK government can screen out the extremists and all those not fully convinced by secular law. In the meantime, all immigration needs to be cut off until such a system is in place, and all those expressing extremist views deported.
I might also add that support and sympathy for terrorists is at one in five levels in the general population, and one in three in the student population. Much worse than the statistics you've mentioned.