The term "Ideologue" and "Debate" are an oxymoron (self cancelling words).
An Ideologue already has made up their mind about whatever the topic is. They have already bought hook, line and sinker, one thought process and are not available to reconsideration.
Its what they are. Its how they see themselves. Its how they view the world. Many people need to know that Reality is immutable and unchanging. Many young people are stuck in the role of being ideologues simply because they have not had enough time and experience to realize that ... things change.
Ideologues need to be standing on solid ground at all times. They have no concept of the fact that the solid ground on which they stand is shifting sand because they have not been standing on it long enough to see it going on.
They are the easiest to con and the easiest to persuade and they are the ones who believe that if we could just come up with the right formula, all the world would suddenly lapse into a form of "Milk & Honey". Their focus is too narrow to see the World for what it is.