Idealism really is like alcoholism. It feel really great, doesn't it, Idealists, to indulge in immature fantasies of "all people are equal", obliterate civilization, high culture, and good people, and then turn around and make any mention of truth against the law, and destroy people who speak the truth. Idealists are really an anomaly in the universe. To go against that which is real, not once, by mistake, but systematically, deliberately, again and again, without ever considering the nett effect of their actions.
It is a reasonable hypothesis to state that Idealists are damaged goods/mutilated souls, that are not ended, but seek to obliterate their own consciousness because they feel that their burden of reality is unbearable, and/or seek to destroy the social and cultural worth of others, in order to bring everything else to their (lower) level of consciousness.
Idealists are addicted to Ideals.
Idealists need their Ideals to achieve trance/bliss.
Idealists take refuge from harsh reality into simplistic Idealism, from which they lash out at anyone trying to get them out of their cave, and scream in unison to drown out the words of those who question their Ideal.
Idealists collect data that supports their Idealistic view on all things, and enact thoughtstop when encountering counter data. Of course, the chance of them encountering counter data is slim, because their Idealist brethren take care to suppress counter data. Idealists collect friends that affirm their Ideal, and run away from non-Idealists that ask uncomfortable questions. Idealists are drunk with their ideals, and can regurgitate without much thinking Ideology to defend their precious Ideal from evil facts and evil logical arguments. Idealists never find peace or enlightenment. Idealist are either in a trance that insulates from reality, or in the process of being disillusioned.
Realists look behind curtains to see how the show works. Idealists sit in the soft chairs and call for the realists to stop disturbing the show.
Idealists will repeat ad infinitum the Ideal that all are free in the Idealistic society, while at the same time persecuting, intimidating, hating, fearing, oppressing, hunting down, imprisoning anyone who asks uncomfortable questions.
Idealists are inherently funny, from a distance. They do not get it, and that makes it even funnier. Idealists go around in cycles of mutually reinforcing anti-realism, and pretend that they are going in a line forward. Realists sit on the other bank of the river of life and look at the Idealist circus.
Idealists Anonymous (IA) is a special group, to which belong all Idealist. No Idealist realizes that they belong to IA, and every Idealist is infuriated at the suggestion that they belong to IA. Idealists at IA give each other awards for being a great enforcer of the Ideal (because it really does NEED ENFORCING), denounce non-Idealists (for "connecting the dots"), ritually burn the books of heretics, and try to convert heathens to the Ideal.
Realists watch Idealists, have Idealist acquaintances, and have to deal with Idealists every day. Realists nod understandingly when Idealists grab the whole bottle of Ideal, and silently nod their head when Idealists demand that we hurt our civilization for the sake of an Ideal.
There is really very little realists can do for Idealists.
Addicted people have to be separated from the substance of their addiction.
Idealists have to be physically confronted with the full implications of the Ideal.
If someone says that "all people are equal", they must be forced to undergo the company of the most degenerate and barbaric "people".