It is simply the nature of things. The more clever and intelligent a chap is, the more servere are the depths of stupidity that he can reach.
I do not know who he is. I have not read his works (a brief information trawl reveals that they might be a bit over my head), and I cannot claim that I am particularly enticed to do so, not at a glance. Thus, I cannot say much regarding his intelligence. It is greater than mine, but that does not prove anything. However, he is certainly a man of some faculties, and thus a very easy victim for that strange laziness that can affect a clever mind, and make it impossibly stupid in its operation when handling certain tasks.
However, the difficulty with piecing a man's opinion together is that, on the internet, all expressions of it are available all at once, like a clump. His statement that sodomy laws ought to remain 'on the book' (whatever that could mean) appears to come from an essay written in 1990. That is, rather a long time ago. In later years, following the decision of the union's Supreme Court that such laws are unconstitutional, he appears to have backed away from that opinion.
That is not to say that he does not still carry a basket of some unsettling (and really quite silly and half-baked) opinions on such matters. I am not particularly willing to lend my defense to this stranger. But in an age where every opinion ever expressed becomes part of an on-line time compression, when in reality they have been uttered several decades apart, it is very important to keep it in mind.
In brief: silly, silly man, made all the sillier because that he knows that he is clever, and stops trying to be clever when he ought to be, and a brief saunter on one of my on-line hobby horses: 'When' is of equal importance to 'What'. And further, I...
Right, well, er... Moving on.