"Enemy is strong and weak" seems like a universal trait for any propaganda, I really have no idea why some want to say that it's a special fascism trait.
It is the exact line the US is taking on Russia. “Ukraine need help now or soon Russia will be in SOME_NATO_COUNTRY” and “Russia is loosing hard” at the same time, often in the same “according to government officials…” speak.
You frame this as a contradiction but a moment of reflection reveals that it's not.
If the US continues to aid Ukraine, then it's likely that Ukraine will be able to beat Russia eventually, due to the West's superior military equipment and tactics.
If the US stops aiding Ukraine, it will be much more difficult for Ukraine to beat Russia. If Russia achieves its goals and gains control of Ukraine, then yes, other NATO countries will be in danger.
Some of the "russia is loosing hard" news is propaganda of course, to raise the morale of people fighting for their homeland. I find it hard to get too mad about that.