[uoaei]

Reactionary behavior is bad, a priori, for the simple fact that it displaces and forbids reasoned discussion. This makes sense for things where "the science is settled" but for many things, especially inherently subjective ones, reactionary behavior simply has no place. For this reason "reactionary politics" is a contradiction in terms while "progressive politics" is not. One can stand for the principles of progress without becoming aligned or dogmatic with respect to one or another vision of the way "forward".

[Nevermark]

Right, it is a true that reactionary things are bad, by definition.

But saying something specific is bad, by labelling it reactionary is an empty argument! It reverses the condition -> implication relationship. It is circular, or at best, charged but unsupported reasoning.

To show something is bad, and possibly reactionary, you have to be specific about what is bad about the specific thing.