No, Rush says things sometimes just for the impact (he’s a showman, after all, and that’s how he makes his living - by entertaining). People take them seriously or they take a buzzword he may have used just off the top of his head in describing a candidate and suddenly that becomes their fixed concept of the candidate.
Rush is what he is, and people have to listen to him with the same judgment and prudence as they would listen to any other entertainer or commentator.