Alexander the Great was not Greek

"Repeat a lie often enough and it becomes true."Among psychologists something like this is known as the "illusion of truth" effect. 

 Here's how a typical experiment on the effect works. It is accepted as truth by serious researchers that "Alexander the Great was Macedonian, he was not Greek". This is the truth, but sometimes they see a parallel version that is not true, something like "Alexander the great was Greek". 

 For some time, 150 years for example, people have been bombarded with the propaganda "Alexander was Greek" by the Greek government, Greek national-fascist and pro-Greek historians, as well as certain groups of people who benefit from this untruth, such as the acquisition and ownership of territories not Greek like Macedonia and Epirus, historically Albanian lands for thousands of years.

And most modern Greeks and some non-students of history today think that Alexander was Greek. And some fraud-scholars of history continue to be paid to spread the lie that Alexander was Greek. 

Alexander was Greek is proof of the saying that if you repeat a lie often enough, it becomes true. And if you look around you from deceitful linguists, deceitful historians and even politicians take advantage of this weakness of human psychology. And the Greek governments of the last 150 years knew and know well that you can make a lie true just by simply repeating it, there would be no need to use all other techniques of persuasion.