Only if they think they will win.So one of the items on your "let's remove this" list is actually not removable. Because if Russia is the Communist SU, then the Eastern countries, especially those bordering with it, and which are not Communist, will be on the same page as whoever seems able to contain the Soviets.
The changes required for victory to seem too improbable to be worth the risk are not that great. Apart from Bulgaria, who made a risk/gain calculation and tried to stay out of the eastern front (not that it did them any good) the others gambled on the USSR either loosing or coming out of the war with a reduced status.
There was a general undervaluation both of the Red Army resilience and, more critically, of the Soviet State resilience. This was coupled with an underevalution both of the value of US assistance to Britain and of the probability of the US entering the war.
There was an historic bias against Russia in most of Eastern Europe and a more recent (but probably more intense) bias against communism. But good intel can overcome a lot of prejudices.
And it's not a "let's remove this" list. It's a "Let's change this" list.
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