On the one hand, instinctively, calling such a large group of people evil feels wrong, it's painting with too broad a brush.
On the other hand, I know where you're coming from. I grew up in NYC feeling pretty much American, but my family is Russian and I speak the language. Over years of encounters with my own extended family and the social network around them, I've struggled to not overgeneralize, to keep context in mind, and to remain open.
But it's hard when you repeatedly encounter so many deeply cynical, bigoted, punitive, and hatefully-normative personalities. I'm hardly a counter-cultural outlier, but I do deviate from the suburban right-wing-materialist worldview that this particular Russian community prefers, so I may as well be from Mars. For that I was told to my face, multiple times, that I'm not normal ("not normal" is the exact phrasing they use) - and because of that I deserve and should accept the criticism and abuse coming my way. And it just keeps coming - casual racism that's basically accepted wisdom and notably bloodthirsty (nuke em all and don't look back!). Then, habitual low-level fraud that no one even recognizes as such (you should really file for divorce! then you can do (a) and (b) and get this [social benefit!]), the elevation of hustle and cunning above all other forms of intelligence, and smug superiority when it comes to political and ethical questions.
The war is some kind of last straw for me. Now, I hear a group of people speaking Russian, I feel an instinctive revulsion. It's not good, but it is what it is.