E.g.: the illogical irrational hyper-emoting vulcans.

Uh, Vulcans have always been illogical and irrational. This is partially because the writers tend to be bad at basic logic, but Trek has a looong history of Vulcans being pompous, racist assholes that are irrationally obsessed with tradition to the point they made it a de facto religion.

They are usually stone faced while they do it, though.