Obscurantist, philistine, barbarian denote one inaccessible or opposed to enlightenment.
An obscurantist is one who is precluded (as by prejudice, traditionalism, or bigotry) from intellectual candor and open-minded inquiry and who is opposed to the introduction of new and enlightened ideas and methods.
A philistine is one whose attention is centered on material or worldly things, and is indifferent or blind to whatever makes an appeal only to the mind or soul. The term usually implies obtuseness and insensitiveness.
Barbarian seldom wholly loses the notion of incompletely civilized that so strongly characterizes the adjective barbarian. As a result the term may be applied aptly to one whose cultural deficiency suggests that befitting a lower or more remote stage of civilization.