I know fascists do this, but doesn't everyone kind of? If you don't think your enemy has strengths then they're not worth being your enemy and if you don't think they have weaknesses then opposing them is pointless.
edit: I guess one difference is fascists pick enemies that genuinely are powerless, but that doesn't really seem to line up with the original claim
It's not really about seeing real strengths and weaknesses. It's about the enemy simultaneously being weak, inferior, non-threatening, and obviously deserving of its place at the bottom of our glorious hierarchy, and dangerous, strong, with wide-reaching ideas and allies in every corner of society, poised to take control at any moment.