But it was an external threat, more than anything else, that mended relations. While traditional Jewish society remained well entrenched in backward Eastern Europe, reports of the rapid acculturation and religious laxity in the West troubled both camps. When the "Haskalah", the Jewish Enlightenment, appeared in Galicia and Congress Poland in the 1810s, it was soon perceived as a dire threat. The "maskilim" themselves detested Hasidism as an anti-rationalist and barbaric phenomenon, as did Western Jews of all shades, including the most right-wing Orthodox such as Rabbi Azriel Hildesheimer. In Galicia especially, hostility towards it defined the "Haskalah" to a large extent, from the staunchly observant Rabbi Zvi Hirsch Chajes and Joseph Perl to the radical anti-Talmudists like Osias Schorr. The Enlightened, who revived Hebrew grammar, often mocked their rivals' lack of eloquence in the language. While a considerable proportion of the "Misnagdim" were not adverse to at least some of the "Haskala"'s goals, the "Rebbe"s were unremittingly hostile.