Well said and largely agree with you. The preference for red has a biological and psychological explanation, as explained by your compatriot Dr. Jordan Peterson. Here is my (non-expert, uneducated) observation on Nazi chic: there is a strict discipline and control on using colours. That's what authority is about. A strong colour like red is predominantly used in the Nazi symbol. Technically, the background for the swastika in a white circle. The red background excites you, the white circle gives your eyes a resting spot from the excitement and therefore your attention hones in on the swastika. Visually the white also resolves the conflict between the red and the black. If you look at the flags of some countries, the red and the yellow are screaming for attention which is tiring to look at. The Japanese aesthetic (wabi-sabi) blossomed from the tea ceremony lead by Sen no Rikyu. The philosophy is the exact opposite of the extravaganza and sumptuousness inherited from ancient China (Tang and Han dynasty). In overly simplified terms, wabi-sabi emphasizes the appreciation of the rustic appearances and imperfection in beings and celebrates natural beauty. You can see the influence on some of the world famous Japanese brands such as Muji or even Yohji Yamamoto. I can understand why those who do not know the concept found it hard to appreciate the opening ceremony of Tokyo Olympics. I cannot explain better than authors like Leonard Koren. You may check out the book "Wabi-Sabi for Artists, Designers, Poets & Philosophers" by Koren, in case you haven't already read it.