There really isn't a single word that perfectly describes this concept in English, but by searching for synonyms for "reactionary" and "conservative", I came across the term "obscurantist" which is most likely the closest you can get, some further synonyms being "counterrevolutionary" and "regressive".
Dictionary.com defines "obscurantism" as:
"1. opposition to the increase and spread of knowledge.
2. deliberate obscurity or evasion of clarity"
If that's not quite what you're looking for, maybe it's better to translate it using more than one word to explain or adding a little extra info.