Full Idea
Bourgeois 'freedom of conscience' is just the toleration of all possible kinds of religious unfreedom of conscience, and the workers' party should endeavour to liberate the conscience from the witchery of religion.
Gist of Idea
Bourgeois 'freedom of conscience' just tolerates all sorts of religious intolerance
Source
Karl Marx (Critique of the Gotha Program [1875], IV)
A Reaction
We see this in modern 'faith' schools in the UK, which do not seem to be required to live up to the standards of freedom of belief expected in the rest of a liberal society.
Book Reference
Marx,Karl: 'Selected Writings', ed/tr. Simon,Lawrence H. [Hackett 1994], p.330