I am well aware of Russian Imperialism.

Are you talking about the left and the right in the USA?

Who aside from modern US Republicans is giving them a pass?

pretty much everyone on the left too. Outside of Chechen wars I've never seen Russia criticised for it's colonial practices from prominent figures on the left.

Jeremy Corbyn has consistently criticised Putin's aggression since Georgia - far more consistently than anyone else on the Right or the Left in the UK.

https://www.rferl.org/a/ukraine-corbyn-interview-russia-ceas...

This is for countries that gained independence from Russia not 100s of nations that are still part of it. Plus he parrots so many Russian talking points on stop arming Ukraine that it's not a very good look.

It's been understated in the US because the US did something similar marching westward across the continent.

Are you equating the control that the USA exerts over countries like Holland, Germany, and France with the control that The Kremlin exerted over countries like Poland, Lithuania, and Georgia?

No, I'm equating the subjugation of low population density areas of Siberia and such with the conquest of North America from its native peoples.

OK, I totally misread that. In that case, that was a while ago. I mean does Belgium turn a blind eye towards Russian massacres in Ukraine because of their history in Congo?

Belgium no longer holds the Congo. The US still holds this huge chunk of North America. It's easier to be moral when it's not in conflict with your own selfish interests.