Well, American society supports Trump, right? and Trump wants to invade Canada and Denmark.
No, "Russian society" is not a monolith supporting the war of aggression. Just like American society is not all like their government officials and quite many people there do not support the autocratic course. Though yes, even here on Hacker News you can meet supporters of both. Sadly.
Yes, it is alarming that many people in Russia support their government. Just as it is alarming for the US. Or any other autocratic country. This isn't a blanket permission to call "all Russians" or "all Americans" or "all Israeli" or "all Palestinians" or "all immigrants" (insert your pejorative of the day).