I'm sorry to hear that a four line sentence was too much for you to follow; think of it as a little mental exercise.
Unfortunately Robin, your visualization of the world and what is happening in it and why is merely an illusion. Let us hope it is a childish illusion based on what is politely called a lack of information, rather than the product of selective blindness induced by ideology. I say that realizing that the odds are against the former as many people go through life not much wiser and not much more informed at their end than they were at their beginning. No need to mention any names.
Monomaniacal adherence to tribalism, ideology or "party lines" is a hallmark of people who cannot or will not think; who prefer the pseudo-religious comforts of "certainty" to the effort required to inform themselves and
draw rational conclusions from what is observable, however uncomfortable those conclusions may be. Moral cowardice is one term for this phenomenon.
The attitude to the rise of Nazism in the 1930s was a classic example of such self-delusion. The attitude of the left to the USSR and later the PRC was even more egregious.
Those historical experiences convinced people with the wits to see the obvious that the real divide in politics and ideology is between those who understand the essential primacy of individual rights and freedoms and those who do not. The excuses for attacking and diminishing individual freedoms change like the weather, the effect of doing so is perpetual, and the trend once begun usually ends in mass murder and misery which can last for generations.
We have today and for the time being, access to a variety of information unparalleled in human history. We're wise to avail ourselves of that opportunity while we can. What you will find may well be very frightening and depressing and our emotional predisposition is to look away, but better to face reality before reality "gets in your face", because it will and soon.