. He is making a point. One that apparently flew right over your head.
The point was that some people want to explain certain violent actions as "senseless", like the holocaust, or any number of jihadi actions. This is wrong - they are not senseless.
1. Lacking sense or meaning; meaningless.
2. Deficient in sense; foolish or stupid.
3. Insensate; unconscious.
Someone with a brain tumor goes nuts and starts attacking people in the street naked is senseless. You ask them afterwards, and they'll be the first to admit "I don't know why I did it". That is senseless.
What the Nazis did, and what Jihadis do today, makes perfect sense when you take into account the philosophy and history on which they were drawn. Antisemitism had very deep roots in Europe, combined with German Nationalism that grew out of the 19th century, when Germans found out that if unified they were an exceedingly powerful force, and pushed in that direction by the writings of the likes of Fichte, Jahn and Arndt, philosophers such as Nietzsche, Hegel, and Kant - all the "Romantics". Hitler and the Nazis were NOT an aberration. They were the logical conclusion of a process and philosophy born a long time earlier. Same with militant Islam / Jihadists. Their actions make perfect sense in relation to their beliefs and history, going back to well before Mohammed - who borrowed liberally from other religions in the region that pre-dated him. There is nothing "senseless" about a Jihadi blowing himself up in a marketplace.
But the fact that they are not senseless, and are founded in a logical structure does not negate the fact they are both evil and must be exterminated.
The point of the article was not to praise Nazis, as you claim. The point is that trying to tell the public that something makes no sense is misleading and counterproductive.
"It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if you do not know your enemies nor yourself, you will be imperiled in every single battle."
- Sun Tzu
Every American, indeed every Westerner, should educate themselves about Islam - particularly the radical branch of it - the ones who think they are on a mission from God to convert or subjugate everyone. We should know why they do what they do so that A) we can devise better strategies against them, and B) so that we can make efforts to avoid such philosophies ever gaining traction again. The Germans did a pretty good job of that after WWII.
You have enemies? Good. That means you've stood up for something, sometime in your life. - W. Churchill