I reckon that "science" has become something of a meaningless signifier today - if I'm excused from using a term from linguistic "science". It seems to be more so a notion that conveys authority rather than anything tangible - like "Dr.", "Professor" or whatever. Not to say that there isn't a manner in which to approach things objectively, but I'd call the "rational" rather than "scientific". Try it out:
"Professor Dawkins is scientific but irrational", "Marx is not scientific but rational", "Phrenologists and socio-geneticists are scientific but irrational" etc etc