Ludwig - // // These people lack that capacity because they are unintelligent //
...sounds a bit like an excuse to me andy. //
Then I suggest you are confusing the different concepts of explanation and excuse.
As I have pointed out, I have explained the behaviour, from my point of view, but that comes nowhere near to excusing it.
To do that, I would have to say something along the lines of "These people can't help it because they are of low intelligence ..." - that would be excusing them, which I didn't, and don't.
I can explain why the Nazis tried to exterminate the Jews - would you think I was finding excuses for them as well?
Explaining is not excusing.
I hope that clears up any misunderstanding.