Original sentence: Similarly, Jacobinist educational policy, which influenced modern France well into the 20th Century, sought to stamp out French minority languages that it considered reactionary, such as Breton, Basque, Catalan, Occitan, Alsatian, Franco-Provençal and Dutch (West Flemish)
Edited sentence: Similarly, it's thought that Jacobinist educational policy had influenced modern France well into the beginning of 20th Century, sought to stamp out French minority languages that it considered reactionary, such as Breton, Basque, Catalan, Occitan, Franco-Provençal and Dutch (West Flemish) but the essential fact was the influence of anti-clericalism (following the Jules Ferry Laws which made primary education in France free, non-clerical and mandatory) instead of Jacobinism