Sure. I'm sure Trinidad and Tobago, and Albania, are definitely Nazis. And those anarchists with their black and red flags, they're definitely Nazis too, right?
Seriously though, in this case, it's the unofficial war flag of Ukraine.
It was originally associated with the WWII nationalist Banderite movement, which has some dubious history but is important in the 20th century story of Ukrainian nationalism. However its usage has evolved and is used widely, albeit unofficially, in modern Ukraine, by lots of military-associated groups who have nothing to do with Nazis or fascism.
One of the main selling points of it is that it trolls people who uncritically believe that Ukraine is run by Nazis.