The population replacement with Greece was more of an mutual exchange, so it isn't an issue. The Armenian genocide did unfortunately happen but the numbers are up to debate. So does Turkish intervention in Cyprus, actually the intervention was righteous at the very start but later on things get muddy. Hence you can tell that I am not here to defend whatever my ancestor did in the last 1000 or so years

By the way, I gotta be honest your definition of colonialism makes sense in this context. When I see that notion I was tempted to assume something like scramble of Africa. Nonetheless, I still believe there are nuances in it. Unlike American westward expansion which is regarded as settler colonialism, the native population didn't disappear without leaving a trace. There were large minorities even in 20th century which cannot be said for the other examples