Yes he is detached from reality in so many ways.
And yes it does seem strange that he said that about his wife.
He's just weird all around.
He doesn't see this as a shortcoming. He assumes most marriages are like his. I'm sure his parents didn't display much love.
I feel bad for him in this regard. I'm sure his life would be very different if there was more true affection in his life, especially early on.
This. It's quite sad that he's perplexed by the sight of a wife sobbing over her husband being shot. It explains a lot, though.
It also says something about Melania. People may like her or think they like her because she stays in hiding most of the time and tries to stay out of trouble, but in my view those two are two peas in a pod.
If he is as you state "detached from reality in so many ways," why would you assume this is an accurate statement about Melania?
For that matter why is everyone assuming Trump is making a somber and serious statement about his marital relationship at the same time as he is talking about how he would not recommend getting shot?
I say it from experience watching her. Remember that jacket she wore that said "I don't care, do you?" That was all about her, nothing that a First Lady "should" say. From then, on I saw how her character was so much like Trump it was unsettling. Not in the bully sense, but in the egoistic "it's all about me" sense. There's a reason she can stand being around Trump.
Except that in any interaction with Trump whatsoever, it's not all about her, ever , at all.