There is not a group of people in the world who lack a moral framework and a moral life. These morals may be very different, mostly they are not, but it is very incorrect to say that communistic usurp ideology with morals.
You talk about leftists in a know-your-enemy way, in the sense that you oppose dismissing them as dumb. This is wise, but to suggest they are robots following some ideological programming is just as damaging to know who you're dealing with.
It is possible to consider ideology like a meme (in the original sense of the word) which is an idea that seeks to replicate itself. There may be some truth in this, I don't know. You can look at tradition, etc. in the same way, and what you inevitably arrive at is the idea of free will and are we really making our own decisions or just at the mercy of our genes / memes. I don't know, but to suggest that one group (leftists) are uniquely taken by it is stupid, in the same know-you-enemy sense.
Also the conflation with Nazi's and leftism is a really tiresome point I keep seeing, it's also factually incorrect. Nazism was born out of far-right movements and political philosophy. They were natural enemies of communists and were anti-liberal, etc.
There are lots of other problems with this piece.