No one likes being told they're an ideologue or that their profound observations are profoundly ideological.
Terms like "ideologue" and "ideological" are examples of an "observer's category" - something the observed would likely take exception to. They are ideologues, never us. We see the truth; they are in thrall to ideology.
I still think 'ideology' is a useful concept that captures something real and important: an army of convictions about what is and ought to be, interconnected so as to form a coherent system of ideas, characterized by certain features, such as the "ideological square" (oversimplifying a bit: us - all good/no real downside; them: all bad/no real upside).
You can't be alert to ideological inclinations without acknowledging that that concept of ideology has some value beyond being a convenient way to dismiss people you disagree with. Categorizing discourse can help us see themes, patterns, and connections, opening up pathways of understanding and analysis: a whole new story unfolds.
Categorizing discourse can also shut down any further thought on the matter: end of story.