Why are there Nazi comments here? The Nazis in Ukraine are the Russian invaders. It's beyond ridiculous to call Zelensky a Nazi. Meanwhile it's Russia that's turning full-blown fascist under Putin.
And while Ukrainians are primarily defending their own country of course, do not ignore Putin's imperialist ambition. He and other Russians talk frequently about attacking even more European countries, like Moldova, the Baltics, and even Poland. And they talk about wanting genocide.
So yes, by blocking Russian aggression and weakening the Russian military, Ukraine is absolutely also defending Europe. And it's absolutely vital that Europe does more to support them. If Ukraine falls to Russian aggression, they will not be the last.