And, after all, if Church and State were to stand in some connection, the former must have some benefit from the alliance.

Did such partnership imply exclusion from its privilege for all who could not accept the special brand of religious doctrine?
Locke, at least, denied the assumption, and argued that since Churches are voluntary societies, they cannot and ought not to have reciprocal relation with the State.

But Locke's theory was meat too strong for the digestion of his time; and no statesman would then have argued that a government could forego the advantage of religious support.

And William, after all, had come to free the church from her oppressor.

Freedom implied protection, and protection in that age involved establishment.
It was thus taken for granted by most members of the Church of England that her adoption by the State meant her superiority to every other form of religious organization.