The entire population of Europe was basically replaced since the fall of Rome. Today’s Greek population, for example, have little genetic connection to those of Aristotle’s contemporaries. People who go around blaming Europeans for colonialism don’t realize that they are not exclusive “victims”.
Exactly. Every place was colonized by somebody else, and everyone had ancestors who were at some point brutalized, raped, or enslaved by someone else's. The difference is that most of us have the sense not to try and use this fact as a get out of jail card.
Most of today’s “Greeks” are probably closer to modern Turks than Alexander & Aristotle’s DNA.
Almost every nation in Europe has Germanic/Nordic bloodlines because of the Barbarian hordes that destroyed Rome. Even though my mom’s family is Spanish/Basque, the blonde hair and blue eyes that runs deep in our family probably suggests Visigothic blood at some point way down in history.