Unless we're talking about writing code in binary, sweeping statements is all we get. What it comes down to is whether or not we like it. If I say, "republicans are dumb", you won't mention sweeping statements, even though it's totally a sweeping statement. Plus, if you agree with it, then we're already up to roughly half the population, so how many more people need to be idiots before the statement becomes roughly true? I think 51% or better is good enough to make a sweeping statement, in which case, is republicans plus 1% of the other half of the country really a stretch?
And there are different tiers of better/worse people. If child A does something wrong and has their toy taken away and accepts it because they know they fucked up, but child B does something wrong and has their toy taken away and refuses to accept it because they think they're the most amazing thing ever created and will literally commit murder to keep their toy, which child do you think is worse and which child do you think is most closely aligned with Americans today?