Mark has already written two books on this subject in which he goes into depth on the demographics and immigration trends. His writing is so erudite and satiric that neither of my children would finish them. Which also says something about our own system of education. Mea Culpa.
He points out it is irreversible. What a shame that so many great works of art, statuary, architecture and books which denote our ethos and culture will be broken, burned or banned when the Muslims impose their sharia culture on the once grand bastions of Western Civilization.
It is not irreversible if the Europeans wake up and do what is necessary, i.e. expelling the invaders.