The pro-Putin, pro-Russia propagandists want to make Ukrainians look like Nazis, which is simply the Russian propaganda they used to justify their invasion of Ukraine. Then the Putinists try to paint people who are pro Ukrainian and anti-Putin as Nazis, and this also is simply Russian propaganda.
I’m sure there are many good non-Christian Ukrainians as well, I don’t know why, in your mind, you have the need to separate all the good people from all the bad people based on whether or not they’re Christians. Goodness and badness crosses every demographic and every religion.