The thing I noticed a lot of people from non-postsoviet countries don't understand and frankly don't care about is the importance of NOT calling the Soviet Union just Russia and soviet citizens just russians. Because it wasn't just Russia, it was a multicultural state with lots of nationalities in it and after the collapse of the USSR they all finally gained independence. It was not just russians who fought Nazis in the WW2, it was not Russia that were destroyed and exploited by them the most.
You don't call the whole European Union just Germany or France or whatever because it's not, it's a union (that also acts like a union and not like a totalitarian regime that suppresses all the national identities and forces on everyone just one specific identity that it deems to be superior).
By calling USSR Russia people enable and support russian narrative of all the countries that were a part of the Soviet Union being also a part of Russia. Which is not fucking true and is actually the driving force behind the Russian invasion of Ukraine.
So please be mindful of what you say.