I think they are a mix of three things.
Geezers stuck in the 1970s and 80s miss the old cold war and get to feel important again.
People with an Eastern Uke and Pole family or friend ties. Their entire thing is revenge against the USSR and they will bankrupt or even get America in to a war for their euro feud.
US Government intel and DOD troll accounts, and ethnic Uke online troll operations (both have been widely reported on)
And probably very small, but I would add, there is a small Catholic vs Orthodox bunch too.
The bottom line, none of them have what is best for America up front in their mind. They all have some eastern Euro agenda, money, globalism, or working out old demons. It’s tragic.
“there is a small Catholic vs Orthodox bunch too”
As a lapsed Catholic myself I’ve never heard Catholics being against Orthodox, what’s that suppose to be about?