whats the definition of antiestablishmantarism?

Answer 1

In the 1800s the Agnlican church was the official church of England, everyone had to pay tax to support the Anglican (Episcopal) ministers and to take care of the churches.
This was called the "Established" church, and people who supported this idea were "Establishmentarians"

OK, so the ANTI- establishment guys were people who did not believe that everyone should be forced to support an official church. This would have included Catholics, Baptists, Quakers and other folks who weren't Anglican. Of course, they didnt want to pay to support a church they didnt believe in!

Answer 2

this is www.encyclopedia.com definition

Antiestablishmentarianism--
(or anti-establishmentarianism) is a policy or attitude that views a nation's power structure as corrupt, repressive, exploitive, etc.

Antiestablishmentarians adhere to the doctrine of opposition to the social and political establishment. Their purpose is to subvert from within. This doctrine holds that establishments lose connection with the people and have their own agendas which frequently destroy the things they blindly don't address.

Antiestablishmentarianism has ties to anarchism but should not be confused with antifederalism.

In a country with an established religion (e.g. England), "Antiestablishmentarianism" means support for the end of the special status of the established religion