The Russians also supported Sanders (Stein too) in 2016, but the media didnt mention it much. It's different now. This is from 2017 ....
"... Other advertisements paid for by shadowy Russian buyers criticized Hillary Clinton and promoted Donald Trump. Some backed Bernie Sanders and his platform even after his presidential campaign had ended, according to a person with knowledge of the ads.
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The ads show a complicated effort that didn’t necessarily hew to promoting Trump and bashing Clinton. Instead, they show a desire to create divisions while sometimes praising Trump, Sanders and Stein. ..."
Russian-funded Facebook ads backed Stein, Sanders and Trump