It's more reasonable to say that the russian people tolerate the war as long as it does not impact their economic situation over a certain tolerance threshold. Almost all of the fighters from the Russian side are on paid voluntary contracts for a reason.
You generally can't really pet a wild brown bear, since they are not interested in humans and would avoid you. You can't run away from it either, since it can outrun you easily
The US military would be the defending force, though, which would put The People at a disadvantage. Pushing through the defenses of a multi-trillion dollar military with AR-15s seems unlikely. I don't even think that China's armed forces could defeat the US military, let alone civilians armed with AR-15s
All being said, I am no military guru and I could be wrong
When it comes to providing direct links to PDFs of scientific papers, you can often run into paywall issues. Court decisions / rulings on the other hand do not belong to any publishers, so it's a different story