Haha, no! I've heard the "F word" used about cops, judges, people with right and left-wing opinions - and even aggressive and "bossy" swans that caught the attention of locals (!). No need at all to infer any particular brand of political ideas with this word, when it's used as an expletive.
I think it's often true and it might
just be true in how some of the soldiers there are speaking. But if you adopt that widely across the whole situation... Many, many people who support Russian actions keep trying to play up the idea that the Ukrainian government is all about fascism now. I think it's more about code for losing 'friendly control' of territory close to home or making any opposition to Putin demonized at that level. To take it too broadly as having no
more particular imagery in mind, would be simply to reduce Putin himself to cussing out Ukraine and the US government too without any moral claims involved, and that would be too simplistic.
And once they are doing much more than cussing wildly to sound mean, it's worth asking well is there any basis in history or definition to believe or include any
of it and if so, how much. Or are they being totally hypocritical. I do gather that there may be a few
radicals in a whole lot of movements and that doesn't necessarily
blacken the Ukrainian opposition as a whole nor immediately justify an invasion (unless Ukraine was say, seriously going to do some ethnic cleansing maybe -- which I highly doubt; it sounds more like Russia stirred up the pro-Russians to create more disorder in Crimea). Just trying to get a clearer sense what's really going on.