Just an FYI: that wiki link does not seem to lead to an article about the fallacy in question, or any kind of fallacy for that matter. You might have been thinking about the continuum fallacy[1], false equivocation, straw man, or red herring. In any regard, I agree that the reasoning in question falls within the bounds of one or other informal fallacies[2].

[1]: https://en.wikipedia.org/wiki/Continuum_fallacy

[2]: https://en.wikipedia.org/wiki/Informal_fallacy