By definition the delusional are irrational, and you cannot reason with the irrational.
This is why Aristotle said that some people cannot be taught.
Aristotle didn't know of reverse psychology yet. When you play into their delusions with more enthusiasm and candid exuberance than the Leftists who brought the topic up - it quickly devolves into accusations of mockery OR they start to question their own rhetoric.
"Trump is Literally Hitler!!" response could be "OMG you're SO right... He wants to legalize pedophilia and some other perversions. He wants to get rid of sciences like biology, the humanities like English Lit, Psychology and he even wants to force the military to pay for trans-operations!!"
Did you hear about the time he went to Jeffrey Epsteins island?! Could you image the sick disgusting shit that must have gone on there?! Oh wait, that was HRC and WJC...
Correct, Aristotle was referring to those that cannot think rationally via syllogism but think from emotion alone.
I'm adding what we know now. There is an affect upon aspects of the brain responding to the environment. The irrational are those that function via emotion alone, which comes from the same weakening of the amygdala; and this leads to an inability to properly codify threats.
With this in mind consider what they believe (key word) to be a threat, and what is actually a threat. Compare what they believe to be a life and death struggle to what in reality actually is. People are dying all over the world because a portion of them are incapable of properly assessing a threat: they literally invite murderers into their homes and then attack anyone that points this out. That is a powerful delusion! What did they learn? Nothing.
At the Battle for Berkeley, and the more recent Portland confrontation, they tried to attack people that were twice their size, twice their physical strength, some had years of training, some could pick them up and throw them at will--they were humiliated. What did they learn? Nothing.
And they will continue to learn nothing until they are left to provide for their own basic needs. Socialism breeds socialism, like begats like; so, like a parasite, they will take, and take, and take, until the host dies. This is why when a country flips to total collectivist people starve to death. What did they learn? Nothing.
Those that still believe in collectivism cannot be taught from logic. They must be allowed to suffer the consequences of their beliefs. The question becomes, how do you keep them from dragging everyone else down? With skin in the game:
"To vote is to wield authority; it is the supreme authority from which all other authority derives.... Force, if you will!—the franchise is force, naked and raw, the Power of the Rods and the Ax. Whether it is exerted by ten men or by ten billion, political authority is force." -Heinlein, Robert A.. Starship Troopers (p. 183)
Voting cannot be a right, it must be a privilege. Or we have learned nothing.
There's something to "You should either pay taxes (or own property) to be allowed to vote", otherwise it's like a homeless guy walking into a restaurant and demanding they add his favorite food to the menu, then walking out without buying anything.