Ah yes, but the fact remains you are not Christopher Hitchens, and as such it is not within your faculties to say he would react in this, that or another way in this, that or another situation.
He could think as I mentioned before that what I said was merely empty words, or he could be outraged, a childish response, as you seem to imply he would be, something I doubt as for all his faults he was nothing if not intellectually inclined. Or he could pity me for making such an uninformed statement of belief (considering his atheism) or he could think it a nice, but ultimately stupid expression of good wishes. The fact remains that he could presumably have reacted in a myriad of ways and since you are not he, you should refrain from making an assumption as to what his reaction would be and keep your thoughts to yourself.