treat like

treat (someone or something) like (someone or something else)

To consider, regard, or deal with someone or something in a certain manner or as if they or it were a certain type of person or thing. I decided to leave the job—I'd had enough of being treated like an amateur by my boss. We've got to treat these like credible threats until we have proof otherwise.
See also: like, something, treat
Farlex Dictionary of Idioms.

treat someone or something like someone or something

to deal with someone or something as if the person or thing were really someone, a type of a person, or something. I like him. He treats me like a king. He treats Jane like Mary—he ignores them both.
See also: like, treat
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • treat (someone or something) like (someone or something else)
  • certain
  • a dead cert
  • cert
  • establish
  • establish (oneself, someone, or something) as (something)
  • establish as
  • or bust
  • (somewhere or something) or bust
  • be a dead cert