Yes, we want to “conserve” our founding documents.
And your point about gradual progressiveness (is that a word?) is good. They want the Gullibles in that pot, slowly warming to a boil.
Even the article indicated my point:
“So they set out to overthrow it little by little, progressively.”
That is the true meaning - but conveniently, “progressive” has another meaning, which is what the commies want everyone to think. That it’s nice because it’s “getting better”.