I think the OP has a point here. On review, the warning was clearly not issued for the “<blah blah blah meaningless frothing drivel>” comment. That drew what appears to be only a note.
The warning came only after the next comment:
As written, the warning appears to be for making an argument Tomndebb deems “nonsense”.
Making a weak argument is not a warnable offense here.
Likewise, Colibri, it is not appropriate to use later comments to justify a previous warning. The warning should stand or fall on the justification given. In this instance, it should fall. If Tom wanted to issue a warning, he should have done it in his mod note about not changing quoted text.