There is a YouTube video (I'd have to sesarch for it) in which makes the point that as the Muslim percentage of a country's population rises, so does Islamification and violence.  The US and a few others are at the bottom of the list, with less than aroung 3%.  The scale goes up to 99% to 100% in Turkey and SAudi Arabia.  As we go up the scale, we see more and more unrest, more and more violence against the native non-Mulsim population.

One of the points I remember is that at a certain percentage (I think Britain has passed it already), they push for halal establishments, which of course provides employment opportunities for Muslims and eventually sharia-run companies.  One of the next steps is to establish sharia councils in cities, where their rules can be applied and enforced outside of the country's own. 

I've given up on "Formerly Great Britain", but there's always a faint chance that the spirits of Nelson, Pitt, Churchill &c, will come back.