Yes but we are talking about Christian expansionism, not the Eastern Empires but specifically the West expanding into the West and the decimation of the indigenous populations , by condemning them for being barbaric murderers, and then murdering them. Hardly a noble effort or cause , rather greed and the need to conquer to expand itself was the driving force.
Pray tell, what is the difference between that and any other expansionism? Including communism.
You're fixated to the point you can't think straight.