I will proceed to imagine, that while a missionary was teaching, talking, and distributing tracts to recommend, his own views of religion, a Moolah were to go round and inform everybody that this Christian believed Mohammed to be an unchaste man, and had used the very argument to such and such a person.

I feel assured that we should all pronounce this proceeding to be a very cunning act of spiteful, bigotry.
My own case, as towards certain Unitarian friends of mine, is quite similar to this.

They preach to me the absolute moral perfection of a certain man (or rather, of a certain portrait) as a sufficient basis for my faith.

Hereby they challenge me, and as it were force me, to inquire into its perfection.

I have tried to confine the argument within a narrow circle.