Many in the Russian liberal opposition, which now operates mostly in exile, unquestioningly support Israel. This is not only due to their tendency to disregard institutionalised racism in Russia but also due to their embrace of a civilisational hierarchy narrative that places the white West at the top. Anti-Palestinian bias is a natural outcome of this worldview.
This was actually a decent write up on it https://www.noemamag.com/how-china-avoided-soviet-style-collapse/
TLDR is that the big mistake that USSR made was to rush into privatization instead of using a measured approach that China used where they started introducing market mechanics in localized and controlled fashion.