That's like blaming Hitler for WW1, though. The OP is very much not an example of fight with USSR.

actually it's not. yes, governments were different in different war events, but it's a broader issue - Russia views ex-soviet (or even countries occupied before USSR) countries as countries which belong to Russia , so this policy/opinion/view continues through generations.

so no, it's not like you are saying.

I'm just curious who was an EU predecessor

In reverse chronological order: Third Reich, Napoleon's Empire, Holy Roman Empire, Western Roman Empire, Roman Empire