Richard Bernstein, mentioned by Paul Nachman below, reviewed Peter Brimelow's Alien Nation in 1995:

...Mr. Brimelow has made a highly cogent presentation of what is going to be the benchmark case against immigration as it is currently taking place. Those who think that the system needs no fixing cannot responsibly hold to that position any longer unless they take Mr. Brimelow's urgent appeal for change into account.

His starting point is the Federal legislation in 1965 that, after a pause of nearly half a century, opened up the gates to the country's third great post-independence wave of immigration, one that is far larger in absolute numbers than its predecessors, and one that is conspicuously non-European and nonwhite in nature. Sometime in the middle of the next century, if current trends continue unchanged, whites will no longer be a majority, and blacks will no longer be the largest minority.

The strong racial element in current immigration has made it more than ever before a delicate subject. It is to Mr. Brimelow's credit that he attacks it head on, unapologetically. Among his most telling points is that a certain sentimental indulgence toward immigration, combined with the fear that to be opposed to it will be seen as racist, has blinded us to its disastrous consequences. [The Immigration Wave: A Plea to Hold It Back, By Richard Bernstein, The New York Times April 19, 1995]

Of course, it's no longer allowed to tackle racial questions head on, especially if you do it unapologetically.

In 2012, when Pat Buchanan was fired from MSNBC over his unapologetic book Suicide of a Superpower, MSNBC President Phil Griffin [Email him]told reporters

“I don't think the ideas that (Buchanan) put forth (in his book) are appropriate for the national dialogue, much less on MSNBC.”