The title changes changes “who refuse to help their owners” in the article to “who harms you,” which is a big difference. The study [1] never uses the word “harm” with respect to cats; it does to reference a different study using infants. That specificity with the word should communicate what they tested for.
Anecdotally, I have had a cat and a dog. Both of them reacted, immediately and quite viciously, to people who raised their voice to me. (Growl and barking and hissing.)
[1] http://animalbehaviorandcognition.org/uploads/journals/30/AB...
They suggest an unsupported conclusion as a possible reason for the observed behavior, but they clearly don't make any actual conclusion and suggest more study is needed.