These two conditions or state of the human mind have always baffled me - regarding their view of their reality.
One has to totally reject and ignore the facts of man's history on Earth. So.... they believe that 6 million Jews didn't die during the rule by Hitler, and 282,000 US and allied solders did not die during the Vietnam War? Both in the name of Marxism, Socialism, and Communism ruled by brutal dictators.
They, like the devout, have unquestionable faith in what they believe in, and it is this blind faith that not only allows them to dismiss all contrary facts to their belief, but it is what allows them to justify any and all acts to accomplish their goal, i.e., the ends justify the means.
For these people, this quote by Robert Oxton Bolton, comes to mind, “A belief is not merely an idea the mind possesses; it is an idea that possesses the mind”.
The second condition... is more plausible, still extremely perplexing for me ... the uniformed and exposure to contrary data.
It just isn't being uninformed, but how the information was presented to them, i.e. as Socialism and not Communism, or that Socialism is all about equality, now equity, and not what it really is, government control of the economy and the mandatory authoritarian government that is needed to control the masses due to having control over the means of production.