Why reasoning with a leftist is almost impossible

Reasoning rationalizing, and persuading your political opposition is damn near impossible.
Why is it so hard to get someone to empathize with you and understand your political, social or philosophical view?
One simple reason emotion overrides reason.
Tens of thousands of years of human evolution has relied on emotional response to aid in human survival.
These emotional responses are rooted within deep reactions including, joy, fear and anger.
These feelings can create dopamine and adrenaline.
Dopamine creates feelings of pleasure and euphoria and basically is akin to a drug  like affect so in short we are dealing with drug addicts and you are killing your leftist friends high when you contradict their world view.
Telling them that they are not a unique victim absolved of all responsibility is a hard pill to swallow.
Telling someone that all of their failures are greatly due to their own short coming and not the behaviors of "the man" or some invisible hand of oppression is not something people want to hear.
Tearing apart world views that an individual has built over a span of decades of indoctrination and propaganda masked as education is not a something that will make people jump for joy in fact it will make them hate you and even want to kill you.
We in the western world that has been rooted within the 17th and 18th century enlightenment philosophies rooted with in classical liberalism and free speech/free thought are now being integrated with cultures who often have limited value of such concepts as well as massive social engineering programs that have been gradually implemented into our society for the past sixty years working to subvert the population into a more authoritarian behavior and mindset.
The subversion has been done greatly through mass media and using subtle tactics of pavlovian control using emotional stimuli.
TV programs, films and art depicting white people as oppressive murders and all non whites as pure angelic victims has been imbedded into the minds of generations of western populations.
Think of the film amistad that shows the evil oppressors as hypocritical white christians holding bible and crucifix's dangling from their hands in slow motion as the helpless african victims weep to the sound heartfelt tragic music.
Never do these films show the African pagan chiefs brutalizing other Africans as they sell their broken foes children to Arab Muslim slave traders or the Jewish merchant that then bought the slaves to sell to other Jewish and gentile slave masters.
The agenda has been to polarize and stigmatize European and former colonial European societies and Christians.
There has been a great deal of strong emotion used to create this polarization and if you disrupt this narrative you will not be cheered by your opposition you will be booed and hated.
Aside from all of this nobody likes feeling like they are wrong or stupid. People like being right and feeling that  dopamine kick of validation.
When great thinkers challenge societies orthodoxy they are rarely rewarded they are killed or bullied.
Socrates, Christ, Galileo were not embraced but brutalized and punished for killing peoples high.
If you want to speak the truth prepare to suffer God knows I have.
Below is a video of the story of the Allegory of the cave by Plato.

It describes what happens to those who wish to enlighten others perfectly.