Realists: You have 5 minutes to surrender your weapons.
Idealists: Or what!?!
Realists: Or we will use disarming logic and truth that will traumatize your brains.
Idealists: Ok, ok, we will give up our weapons, but don't say a word against our Ideals.
Would you give a Priest of Idealism money because they say that "God" wants YOU to give THEM money (and not the other way around)? Would you give your vote to a Politician of Idealism whom you do not know, and trust them without doubt because they utter the right (magic) words? Would you hit your back with a stick or a rope with iron painful thingies on it because someone wrote some magic words down that say that your "soul" is damned and corrupted and that "hell" awaits you and that we are all sinners and give the Priests of Magic Words land and money right now, you ignorant non-priest class person?!
Would you refrain from procreating yourself but give money, food and medicine to subhuman savage hordes so that they can multiply EVEN MORE because some professor says in wonderful Magic Words that we must repent for making more progress than the others, or we must have less children lest the world get overpopulated? Would you kill people who have never done you wrong, who look like you so much they could be your family, have the same hopes as you because a politician has denoted them with Magic Words as "The Enemy"?
Will you lie down on the ground in front of a tank-killing-machine and let it crush your body because they demand with truly powerful Magic Words that you never in any way resist their Ideal, doublethink brand, and surrender to them your freedom? Would you give your money, land and power to people who insist that you must do so this very instant because of some (unprovable) miracle, (sinful to doubt) revelation, (evil to disbelieve) prophecy, or (illegal to question) Book of Magic Words?
No? Countless people have gone before you, suffered enormously because of their choice, and then chosen again for basically the same thing, to suffer enormously again.
Idealists never learn. Idealists shut their eyes, shout that they see a Higher Reality than the plain facts around us, and walk into walls, repeatedly. And demand everyone else shut their eyes. Realists are always learning. Realists open their eyes, look around, and carefully try and find the door out of the Idealist insane asylum. The true purpose of life on this plane is to experience and learn all that we can. The false goal is to seek domination, stagnation and refuse to learn.
The words of realists are like wartime sirens, the words of Idealists like anthems. One serves to protect your ass from shrapnel, the other to hypnotize you into mass group death. Don't let Magic Words that refer to some abstract Higher Truth shut your eyes to the facts of the matter.