"People don't know what Socialism means" is the worst case of intentional ignorance about things that are completely understandable by people who refuse to look something up since "People in the middle east have been fighting for centuries and nobody understands why."

Jargon and labels are part of the way people are controlled - simplify complex concepts down to repeatable simple words and now you can both control the meaning of such soft definintion terms (notice how the meaning of "terrorist" has been moved over time to become "against those in power") plus constant repetition breeds familiarity, thus the very same cognitive paths that transform brand-familiarity into "comfort with brand" and hence favoring it over less familiar brand, are exercised to get people to accept provided political "explanations" & "solutions" using those slogans.

That said, in my experience if you try and explain complex things to people with enough complexity and completeness for them to understand the subtleties of the subject, they switch off half way (like, I bet, plenty of people reading this post that didn't pass the first half of the first paragraph), so you have to somehow find at least simple metaphors, so not quite down reducing it to slogans but not all that far.