David Horowitz offers a great critique of Christopher Hitchens, starting with the following preface:
I had just finished this essay when I heard the terrible news that my friend Christopher had a cancer whose prognosis was dire. My heart and thoughts go out to him, as they would to a brother. I have known Christopher as a man of great courage and decency and have an affection for him that is not adequately expressed in the intellectual argument that follows. It is indeed an intellectual argument, and Christopher, I am sure, will welcome it as a testament to the way in which he has challenged us all — just as I am sure that he will continue to do so.
Horowitz's transition from a radical leftest to a conservative involved discovering how "expansive" the conservative movement was when valuing differences of opinion. In Horowitz's case, he cited William Safire's condemnation of Oliver North during the "IranGate" controversy as a big turning point in his political reorientation. He continues the tradition with a frank evaluation of Hitchens and his politics.