Russians aren’t all just nice people fooled by state media, either. They have their own version of MAGAt over there, and those dudes are saying “Ukraine is ours historically. The west can go fuck the selves if they don’t like it.”
This allows them to feel simultaneously strong in their local sphere and relevant on the world stage. These feelings are desperately needed by complete assholes who have almost nothing good about themselves or their country to point to.