You're making three points, there, Fester, and I'm not sure how they're related.
On the first, however, I have lived very close to extremely large Muslim communities, so I can speak with some experience about them. I accept that radicalisation of the young is a growing problem, but that's not the point of that 'letter'; that 'letter' exists to spread the very hatred, mistrust and bigotry on which groups like the EDL and other far right organisations thrive and which, like all politics of hatred, simply serves to set one group against another
without any basis in reason.Your average Muslim is very much like your average person; most want nothing more than to live in peace, work for their living and look after their families. And I think you're wrong about the media, in a big way. Papers like the DFM and Telegraph have entire teams attempting to unearth every grubby detail they can about Muslim society in the UK. What should be making people think is how little they've managed to dig up, considering their resources.
Your the second point
I'm afraid that a major change is happening in the world, in terms of disproportionate birth rates, and a new culture whereby the majority expect luxurious lives, but refuse to work hard or even contribute anything to get it.
can't really be substantiated. Birth rates in the Western world have been falling steadily for many years, but even China's tenacious approach to population management has only managed to slow their enormous population growth.
On your final point
a new culture whereby the majority expect luxurious lives, but refuse to work hard or even contribute anything to get it.
I'd be interested to know what your source is for that statement.